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Finding the Fourth Proportional to 28,491.53, 42,737.16 and 7,715.03

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Solution

The fourth proportional to 28,491.53, 42,737.16 and 7,715.03 is: 11,572.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491.53 : 42,737.16 = 7,715.03 : x
  2. Step 2: Convert to fraction form
    28,491.53/42,737.16 = 7,715.03/x
  3. Step 3: Cross multiply
    28,491.53x = 42,737.16 × 7,715.03
  4. Step 4: Simplify right side
    28,491.53x = 329,718,471.51
  5. Step 5: Solve for x
    x = 329,718,471.51/28,491.53
  6. Step 6: Final answer
    x = 11,572.51

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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.