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Finding the Fourth Proportional to 26,657.80, 39,992.10 and 9,129.40

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Solution

The fourth proportional to 26,657.80, 39,992.10 and 9,129.40 is: 13,695.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,657.80 : 39,992.10 = 9,129.40 : x
  2. Step 2: Convert to fraction form
    26,657.80/39,992.10 = 9,129.40/x
  3. Step 3: Cross multiply
    26,657.80x = 39,992.10 × 9,129.40
  4. Step 4: Simplify right side
    26,657.80x = 365,103,877.74
  5. Step 5: Solve for x
    x = 365,103,877.74/26,657.80
  6. Step 6: Final answer
    x = 13,695.95

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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.