Home / 28,001.28-42,005.68-9,275.16

Finding the Fourth Proportional to 28,001.28, 42,005.68 and 9,275.16

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Solution

The fourth proportional to 28,001.28, 42,005.68 and 9,275.16 is: 13,913.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,001.28 : 42,005.68 = 9,275.16 : x
  2. Step 2: Convert to fraction form
    28,001.28/42,005.68 = 9,275.16/x
  3. Step 3: Cross multiply
    28,001.28x = 42,005.68 × 9,275.16
  4. Step 4: Simplify right side
    28,001.28x = 389,609,402.91
  5. Step 5: Solve for x
    x = 389,609,402.91/28,001.28
  6. Step 6: Final answer
    x = 13,913.99

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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.