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Finding the Fourth Proportional to 18,475.20, 25,494.48 and 10,921.20

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Solution

The fourth proportional to 18,475.20, 25,494.48 and 10,921.20 is: 15,070.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,475.20 : 25,494.48 = 10,921.20 : x
  2. Step 2: Convert to fraction form
    18,475.20/25,494.48 = 10,921.20/x
  3. Step 3: Cross multiply
    18,475.20x = 25,494.48 × 10,921.20
  4. Step 4: Simplify right side
    18,475.20x = 278,430,314.98
  5. Step 5: Solve for x
    x = 278,430,314.98/18,475.20
  6. Step 6: Final answer
    x = 15,070.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.