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Finding the Fourth Proportional to 20,062.40, 30,158.40 and 14,259.20

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Solution

The fourth proportional to 20,062.40, 30,158.40 and 14,259.20 is: 21,434.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,062.40 : 30,158.40 = 14,259.20 : x
  2. Step 2: Convert to fraction form
    20,062.40/30,158.40 = 14,259.20/x
  3. Step 3: Cross multiply
    20,062.40x = 30,158.40 × 14,259.20
  4. Step 4: Simplify right side
    20,062.40x = 430,034,657.28
  5. Step 5: Solve for x
    x = 430,034,657.28/20,062.40
  6. Step 6: Final answer
    x = 21,434.86

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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.