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Finding the Fourth Proportional to 28,481.63, 42,723.05 and 9,761.58

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Solution

The fourth proportional to 28,481.63, 42,723.05 and 9,761.58 is: 14,642.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,481.63 : 42,723.05 = 9,761.58 : x
  2. Step 2: Convert to fraction form
    28,481.63/42,723.05 = 9,761.58/x
  3. Step 3: Cross multiply
    28,481.63x = 42,723.05 × 9,761.58
  4. Step 4: Simplify right side
    28,481.63x = 417,044,421.61
  5. Step 5: Solve for x
    x = 417,044,421.61/28,481.63
  6. Step 6: Final answer
    x = 14,642.58

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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.