Home / 15,351.74-21,188.43-9,980.84

Finding the Fourth Proportional to 15,351.74, 21,188.43 and 9,980.84

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Solution

The fourth proportional to 15,351.74, 21,188.43 and 9,980.84 is: 13,775.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,351.74 : 21,188.43 = 9,980.84 : x
  2. Step 2: Convert to fraction form
    15,351.74/21,188.43 = 9,980.84/x
  3. Step 3: Cross multiply
    15,351.74x = 21,188.43 × 9,980.84
  4. Step 4: Simplify right side
    15,351.74x = 211,478,329.68
  5. Step 5: Solve for x
    x = 211,478,329.68/15,351.74
  6. Step 6: Final answer
    x = 13,775.53

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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.