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Finding the Fourth Proportional to 28,475.97, 42,712.74 and 8,753.69

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Solution

The fourth proportional to 28,475.97, 42,712.74 and 8,753.69 is: 13,130.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,475.97 : 42,712.74 = 8,753.69 : x
  2. Step 2: Convert to fraction form
    28,475.97/42,712.74 = 8,753.69/x
  3. Step 3: Cross multiply
    28,475.97x = 42,712.74 × 8,753.69
  4. Step 4: Simplify right side
    28,475.97x = 373,893,871.45
  5. Step 5: Solve for x
    x = 373,893,871.45/28,475.97
  6. Step 6: Final answer
    x = 13,130.15

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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.