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Finding the Fourth Proportional to 28,510.73, 42,737.40 and 11,879.97

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Solution

The fourth proportional to 28,510.73, 42,737.40 and 11,879.97 is: 17,807.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,510.73 : 42,737.40 = 11,879.97 : x
  2. Step 2: Convert to fraction form
    28,510.73/42,737.40 = 11,879.97/x
  3. Step 3: Cross multiply
    28,510.73x = 42,737.40 × 11,879.97
  4. Step 4: Simplify right side
    28,510.73x = 507,718,836.20
  5. Step 5: Solve for x
    x = 507,718,836.20/28,510.73
  6. Step 6: Final answer
    x = 17,807.99

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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.