Home / 28,655.88-42,966.10-9,931.56

Finding the Fourth Proportional to 28,655.88, 42,966.10 and 9,931.56

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Solution

The fourth proportional to 28,655.88, 42,966.10 and 9,931.56 is: 14,891.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,655.88 : 42,966.10 = 9,931.56 : x
  2. Step 2: Convert to fraction form
    28,655.88/42,966.10 = 9,931.56/x
  3. Step 3: Cross multiply
    28,655.88x = 42,966.10 × 9,931.56
  4. Step 4: Simplify right side
    28,655.88x = 426,720,400.12
  5. Step 5: Solve for x
    x = 426,720,400.12/28,655.88
  6. Step 6: Final answer
    x = 14,891.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.