Home / 15,387.39-21,220.51-10,085.13

Finding the Fourth Proportional to 15,387.39, 21,220.51 and 10,085.13

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Solution

The fourth proportional to 15,387.39, 21,220.51 and 10,085.13 is: 13,908.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387.39 : 21,220.51 = 10,085.13 : x
  2. Step 2: Convert to fraction form
    15,387.39/21,220.51 = 10,085.13/x
  3. Step 3: Cross multiply
    15,387.39x = 21,220.51 × 10,085.13
  4. Step 4: Simplify right side
    15,387.39x = 214,011,656.38
  5. Step 5: Solve for x
    x = 214,011,656.38/15,387.39
  6. Step 6: Final answer
    x = 13,908.25

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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.