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Finding the Fourth Proportional to 26,641.20, 39,961.80 and 9,108.40

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Solution

The fourth proportional to 26,641.20, 39,961.80 and 9,108.40 is: 13,662.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,641.20 : 39,961.80 = 9,108.40 : x
  2. Step 2: Convert to fraction form
    26,641.20/39,961.80 = 9,108.40/x
  3. Step 3: Cross multiply
    26,641.20x = 39,961.80 × 9,108.40
  4. Step 4: Simplify right side
    26,641.20x = 363,988,059.12
  5. Step 5: Solve for x
    x = 363,988,059.12/26,641.20
  6. Step 6: Final answer
    x = 13,662.60

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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.