Home / 20,665.20-31,062.60-20,276.40

Finding the Fourth Proportional to 20,665.20, 31,062.60 and 20,276.40

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Solution

The fourth proportional to 20,665.20, 31,062.60 and 20,276.40 is: 30,478.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.20 : 31,062.60 = 20,276.40 : x
  2. Step 2: Convert to fraction form
    20,665.20/31,062.60 = 20,276.40/x
  3. Step 3: Cross multiply
    20,665.20x = 31,062.60 × 20,276.40
  4. Step 4: Simplify right side
    20,665.20x = 629,837,702.64
  5. Step 5: Solve for x
    x = 629,837,702.64/20,665.20
  6. Step 6: Final answer
    x = 30,478.18

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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.