Home / 10,988.43-15,171.02-7,218.29

Finding the Fourth Proportional to 10,988.43, 15,171.02 and 7,218.29

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Solution

The fourth proportional to 10,988.43, 15,171.02 and 7,218.29 is: 9,965.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,988.43 : 15,171.02 = 7,218.29 : x
  2. Step 2: Convert to fraction form
    10,988.43/15,171.02 = 7,218.29/x
  3. Step 3: Cross multiply
    10,988.43x = 15,171.02 × 7,218.29
  4. Step 4: Simplify right side
    10,988.43x = 109,508,710.01
  5. Step 5: Solve for x
    x = 109,508,710.01/10,988.43
  6. Step 6: Final answer
    x = 9,965.82

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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.