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Finding the Fourth Proportional to 28,480.41, 42,721.79 and 9,773.30

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Solution

The fourth proportional to 28,480.41, 42,721.79 and 9,773.30 is: 14,660.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.41 : 42,721.79 = 9,773.30 : x
  2. Step 2: Convert to fraction form
    28,480.41/42,721.79 = 9,773.30/x
  3. Step 3: Cross multiply
    28,480.41x = 42,721.79 × 9,773.30
  4. Step 4: Simplify right side
    28,480.41x = 417,532,821.34
  5. Step 5: Solve for x
    x = 417,532,821.34/28,480.41
  6. Step 6: Final answer
    x = 14,660.35

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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.