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Finding the Fourth Proportional to 28,382.92, 42,574.38 and 8,661.58

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Solution

The fourth proportional to 28,382.92, 42,574.38 and 8,661.58 is: 12,992.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,382.92 : 42,574.38 = 8,661.58 : x
  2. Step 2: Convert to fraction form
    28,382.92/42,574.38 = 8,661.58/x
  3. Step 3: Cross multiply
    28,382.92x = 42,574.38 × 8,661.58
  4. Step 4: Simplify right side
    28,382.92x = 368,761,398.32
  5. Step 5: Solve for x
    x = 368,761,398.32/28,382.92
  6. Step 6: Final answer
    x = 12,992.37

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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.