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Finding the Fourth Proportional to 28,661.32, 42,989.92 and 7,600.88

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Solution

The fourth proportional to 28,661.32, 42,989.92 and 7,600.88 is: 11,400.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,661.32 : 42,989.92 = 7,600.88 : x
  2. Step 2: Convert to fraction form
    28,661.32/42,989.92 = 7,600.88/x
  3. Step 3: Cross multiply
    28,661.32x = 42,989.92 × 7,600.88
  4. Step 4: Simplify right side
    28,661.32x = 326,761,223.13
  5. Step 5: Solve for x
    x = 326,761,223.13/28,661.32
  6. Step 6: Final answer
    x = 11,400.77

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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.