Home / 12,121.60-18,156.48-7,490.56

Finding the Fourth Proportional to 12,121.60, 18,156.48 and 7,490.56

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Solution

The fourth proportional to 12,121.60, 18,156.48 and 7,490.56 is: 11,219.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.60 : 18,156.48 = 7,490.56 : x
  2. Step 2: Convert to fraction form
    12,121.60/18,156.48 = 7,490.56/x
  3. Step 3: Cross multiply
    12,121.60x = 18,156.48 × 7,490.56
  4. Step 4: Simplify right side
    12,121.60x = 136,002,202.83
  5. Step 5: Solve for x
    x = 136,002,202.83/12,121.60
  6. Step 6: Final answer
    x = 11,219.82

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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.