Home / 13,381.24-20,066.05-7,139.86

Finding the Fourth Proportional to 13,381.24, 20,066.05 and 7,139.86

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Solution

The fourth proportional to 13,381.24, 20,066.05 and 7,139.86 is: 10,706.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.24 : 20,066.05 = 7,139.86 : x
  2. Step 2: Convert to fraction form
    13,381.24/20,066.05 = 7,139.86/x
  3. Step 3: Cross multiply
    13,381.24x = 20,066.05 × 7,139.86
  4. Step 4: Simplify right side
    13,381.24x = 143,268,719.74
  5. Step 5: Solve for x
    x = 143,268,719.74/13,381.24
  6. Step 6: Final answer
    x = 10,706.69

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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.