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Finding the Fourth Proportional to 28,402.43, 42,603.03 and 7,625.93

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Solution

The fourth proportional to 28,402.43, 42,603.03 and 7,625.93 is: 11,438.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,402.43 : 42,603.03 = 7,625.93 : x
  2. Step 2: Convert to fraction form
    28,402.43/42,603.03 = 7,625.93/x
  3. Step 3: Cross multiply
    28,402.43x = 42,603.03 × 7,625.93
  4. Step 4: Simplify right side
    28,402.43x = 324,887,511.55
  5. Step 5: Solve for x
    x = 324,887,511.55/28,402.43
  6. Step 6: Final answer
    x = 11,438.72

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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.