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Finding the Fourth Proportional to 28,007.13, 42,001.99 and 9,282.97

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Solution

The fourth proportional to 28,007.13, 42,001.99 and 9,282.97 is: 13,921.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,007.13 : 42,001.99 = 9,282.97 : x
  2. Step 2: Convert to fraction form
    28,007.13/42,001.99 = 9,282.97/x
  3. Step 3: Cross multiply
    28,007.13x = 42,001.99 × 9,282.97
  4. Step 4: Simplify right side
    28,007.13x = 389,903,213.11
  5. Step 5: Solve for x
    x = 389,903,213.11/28,007.13
  6. Step 6: Final answer
    x = 13,921.57

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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.