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Finding the Fourth Proportional to 26,921.20, 40,381.80 and 9,385.20

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Solution

The fourth proportional to 26,921.20, 40,381.80 and 9,385.20 is: 14,077.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,921.20 : 40,381.80 = 9,385.20 : x
  2. Step 2: Convert to fraction form
    26,921.20/40,381.80 = 9,385.20/x
  3. Step 3: Cross multiply
    26,921.20x = 40,381.80 × 9,385.20
  4. Step 4: Simplify right side
    26,921.20x = 378,991,269.36
  5. Step 5: Solve for x
    x = 378,991,269.36/26,921.20
  6. Step 6: Final answer
    x = 14,077.80

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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.