Home / 12,380.32-18,541.88-7,439.07

Finding the Fourth Proportional to 12,380.32, 18,541.88 and 7,439.07

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Solution

The fourth proportional to 12,380.32, 18,541.88 and 7,439.07 is: 11,141.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,380.32 : 18,541.88 = 7,439.07 : x
  2. Step 2: Convert to fraction form
    12,380.32/18,541.88 = 7,439.07/x
  3. Step 3: Cross multiply
    12,380.32x = 18,541.88 × 7,439.07
  4. Step 4: Simplify right side
    12,380.32x = 137,934,306.06
  5. Step 5: Solve for x
    x = 137,934,306.06/12,380.32
  6. Step 6: Final answer
    x = 11,141.42

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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.