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Finding the Fourth Proportional to 26,679.60, 40,008.60 and 9,140.40

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Solution

The fourth proportional to 26,679.60, 40,008.60 and 9,140.40 is: 13,706.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,679.60 : 40,008.60 = 9,140.40 : x
  2. Step 2: Convert to fraction form
    26,679.60/40,008.60 = 9,140.40/x
  3. Step 3: Cross multiply
    26,679.60x = 40,008.60 × 9,140.40
  4. Step 4: Simplify right side
    26,679.60x = 365,694,607.44
  5. Step 5: Solve for x
    x = 365,694,607.44/26,679.60
  6. Step 6: Final answer
    x = 13,706.90

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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.