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Finding the Fourth Proportional to 28,479.56, 42,720.12 and 7,703

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Solution

The fourth proportional to 28,479.56, 42,720.12 and 7,703 is: 11,554.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,479.56 : 42,720.12 = 7,703 : x
  2. Step 2: Convert to fraction form
    28,479.56/42,720.12 = 7,703/x
  3. Step 3: Cross multiply
    28,479.56x = 42,720.12 × 7,703
  4. Step 4: Simplify right side
    28,479.56x = 329,073,084.36
  5. Step 5: Solve for x
    x = 329,073,084.36/28,479.56
  6. Step 6: Final answer
    x = 11,554.71

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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.