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Finding the Fourth Proportional to 20,180.70, 30,271.05 and 15,801.90

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Solution

The fourth proportional to 20,180.70, 30,271.05 and 15,801.90 is: 23,702.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,180.70 : 30,271.05 = 15,801.90 : x
  2. Step 2: Convert to fraction form
    20,180.70/30,271.05 = 15,801.90/x
  3. Step 3: Cross multiply
    20,180.70x = 30,271.05 × 15,801.90
  4. Step 4: Simplify right side
    20,180.70x = 478,340,105.00
  5. Step 5: Solve for x
    x = 478,340,105.00/20,180.70
  6. Step 6: Final answer
    x = 23,702.85

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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.