Home / 12,359.20-18,553.20-7,434.40

Finding the Fourth Proportional to 12,359.20, 18,553.20 and 7,434.40

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Solution

The fourth proportional to 12,359.20, 18,553.20 and 7,434.40 is: 11,160.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,359.20 : 18,553.20 = 7,434.40 : x
  2. Step 2: Convert to fraction form
    12,359.20/18,553.20 = 7,434.40/x
  3. Step 3: Cross multiply
    12,359.20x = 18,553.20 × 7,434.40
  4. Step 4: Simplify right side
    12,359.20x = 137,931,910.08
  5. Step 5: Solve for x
    x = 137,931,910.08/12,359.20
  6. Step 6: Final answer
    x = 11,160.26

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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.