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Finding the Fourth Proportional to 28,990.70, 43,488.78 and 9,264.57

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Solution

The fourth proportional to 28,990.70, 43,488.78 and 9,264.57 is: 13,897.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,990.70 : 43,488.78 = 9,264.57 : x
  2. Step 2: Convert to fraction form
    28,990.70/43,488.78 = 9,264.57/x
  3. Step 3: Cross multiply
    28,990.70x = 43,488.78 × 9,264.57
  4. Step 4: Simplify right side
    28,990.70x = 402,904,846.52
  5. Step 5: Solve for x
    x = 402,904,846.52/28,990.70
  6. Step 6: Final answer
    x = 13,897.73

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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.