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Finding the Fourth Proportional to 28,969.52, 43,454.28 and 13,385.12

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Solution

The fourth proportional to 28,969.52, 43,454.28 and 13,385.12 is: 20,077.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,969.52 : 43,454.28 = 13,385.12 : x
  2. Step 2: Convert to fraction form
    28,969.52/43,454.28 = 13,385.12/x
  3. Step 3: Cross multiply
    28,969.52x = 43,454.28 × 13,385.12
  4. Step 4: Simplify right side
    28,969.52x = 581,640,752.31
  5. Step 5: Solve for x
    x = 581,640,752.31/28,969.52
  6. Step 6: Final answer
    x = 20,077.68

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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.