Home / 13,711.50-18,921.87-7,423.92

Finding the Fourth Proportional to 13,711.50, 18,921.87 and 7,423.92

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Solution

The fourth proportional to 13,711.50, 18,921.87 and 7,423.92 is: 10,245.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.50 : 18,921.87 = 7,423.92 : x
  2. Step 2: Convert to fraction form
    13,711.50/18,921.87 = 7,423.92/x
  3. Step 3: Cross multiply
    13,711.50x = 18,921.87 × 7,423.92
  4. Step 4: Simplify right side
    13,711.50x = 140,474,449.13
  5. Step 5: Solve for x
    x = 140,474,449.13/13,711.50
  6. Step 6: Final answer
    x = 10,245.01

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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.