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Finding the Fourth Proportional to 28,484.80, 42,726.64 and 8,507.82

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Solution

The fourth proportional to 28,484.80, 42,726.64 and 8,507.82 is: 12,761.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,484.80 : 42,726.64 = 8,507.82 : x
  2. Step 2: Convert to fraction form
    28,484.80/42,726.64 = 8,507.82/x
  3. Step 3: Cross multiply
    28,484.80x = 42,726.64 × 8,507.82
  4. Step 4: Simplify right side
    28,484.80x = 363,510,594.46
  5. Step 5: Solve for x
    x = 363,510,594.46/28,484.80
  6. Step 6: Final answer
    x = 12,761.56

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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.