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Finding the Fourth Proportional to 20,281.80, 30,424.48 and 7,134.28

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Solution

The fourth proportional to 20,281.80, 30,424.48 and 7,134.28 is: 10,702.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.80 : 30,424.48 = 7,134.28 : x
  2. Step 2: Convert to fraction form
    20,281.80/30,424.48 = 7,134.28/x
  3. Step 3: Cross multiply
    20,281.80x = 30,424.48 × 7,134.28
  4. Step 4: Simplify right side
    20,281.80x = 217,056,759.17
  5. Step 5: Solve for x
    x = 217,056,759.17/20,281.80
  6. Step 6: Final answer
    x = 10,702.05

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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.