Home / 13,711.24-18,921.45-7,742.89

Finding the Fourth Proportional to 13,711.24, 18,921.45 and 7,742.89

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Solution

The fourth proportional to 13,711.24, 18,921.45 and 7,742.89 is: 10,685.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.24 : 18,921.45 = 7,742.89 : x
  2. Step 2: Convert to fraction form
    13,711.24/18,921.45 = 7,742.89/x
  3. Step 3: Cross multiply
    13,711.24x = 18,921.45 × 7,742.89
  4. Step 4: Simplify right side
    13,711.24x = 146,506,705.99
  5. Step 5: Solve for x
    x = 146,506,705.99/13,711.24
  6. Step 6: Final answer
    x = 10,685.15

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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.