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Finding the Fourth Proportional to 11,139.80, 16,695.10 and 5,599.40

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Solution

The fourth proportional to 11,139.80, 16,695.10 and 5,599.40 is: 8,391.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.80 : 16,695.10 = 5,599.40 : x
  2. Step 2: Convert to fraction form
    11,139.80/16,695.10 = 5,599.40/x
  3. Step 3: Cross multiply
    11,139.80x = 16,695.10 × 5,599.40
  4. Step 4: Simplify right side
    11,139.80x = 93,482,542.94
  5. Step 5: Solve for x
    x = 93,482,542.94/11,139.80
  6. Step 6: Final answer
    x = 8,391.76

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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.