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Finding the Fourth Proportional to 18,561.57, 25,602.12 and 11,483.79

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Solution

The fourth proportional to 18,561.57, 25,602.12 and 11,483.79 is: 15,839.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.57 : 25,602.12 = 11,483.79 : x
  2. Step 2: Convert to fraction form
    18,561.57/25,602.12 = 11,483.79/x
  3. Step 3: Cross multiply
    18,561.57x = 25,602.12 × 11,483.79
  4. Step 4: Simplify right side
    18,561.57x = 294,009,369.63
  5. Step 5: Solve for x
    x = 294,009,369.63/18,561.57
  6. Step 6: Final answer
    x = 15,839.68

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Half scale
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Double scale
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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.