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Finding the Fourth Proportional to 25,879.60, 38,761.80 and 20,004.40

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Solution

The fourth proportional to 25,879.60, 38,761.80 and 20,004.40 is: 29,962.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,879.60 : 38,761.80 = 20,004.40 : x
  2. Step 2: Convert to fraction form
    25,879.60/38,761.80 = 20,004.40/x
  3. Step 3: Cross multiply
    25,879.60x = 38,761.80 × 20,004.40
  4. Step 4: Simplify right side
    25,879.60x = 775,406,551.92
  5. Step 5: Solve for x
    x = 775,406,551.92/25,879.60
  6. Step 6: Final answer
    x = 29,962.08

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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.