Home / 15,310.14-21,130.92-9,939.30

Finding the Fourth Proportional to 15,310.14, 21,130.92 and 9,939.30

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Solution

The fourth proportional to 15,310.14, 21,130.92 and 9,939.30 is: 13,718.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,310.14 : 21,130.92 = 9,939.30 : x
  2. Step 2: Convert to fraction form
    15,310.14/21,130.92 = 9,939.30/x
  3. Step 3: Cross multiply
    15,310.14x = 21,130.92 × 9,939.30
  4. Step 4: Simplify right side
    15,310.14x = 210,026,553.16
  5. Step 5: Solve for x
    x = 210,026,553.16/15,310.14
  6. Step 6: Final answer
    x = 13,718.13

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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.