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Finding the Fourth Proportional to 28,290.47, 42,435.71 and 7,513.97

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Solution

The fourth proportional to 28,290.47, 42,435.71 and 7,513.97 is: 11,270.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.47 : 42,435.71 = 7,513.97 : x
  2. Step 2: Convert to fraction form
    28,290.47/42,435.71 = 7,513.97/x
  3. Step 3: Cross multiply
    28,290.47x = 42,435.71 × 7,513.97
  4. Step 4: Simplify right side
    28,290.47x = 318,860,402.12
  5. Step 5: Solve for x
    x = 318,860,402.12/28,290.47
  6. Step 6: Final answer
    x = 11,270.95

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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.