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Finding the Fourth Proportional to 18,478.81, 25,500.75 and 9,980.94

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Solution

The fourth proportional to 18,478.81, 25,500.75 and 9,980.94 is: 13,773.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.81 : 25,500.75 = 9,980.94 : x
  2. Step 2: Convert to fraction form
    18,478.81/25,500.75 = 9,980.94/x
  3. Step 3: Cross multiply
    18,478.81x = 25,500.75 × 9,980.94
  4. Step 4: Simplify right side
    18,478.81x = 254,521,455.71
  5. Step 5: Solve for x
    x = 254,521,455.71/18,478.81
  6. Step 6: Final answer
    x = 13,773.69

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.