Home / 20,158.96-30,180.12-13,131.40

Finding the Fourth Proportional to 20,158.96, 30,180.12 and 13,131.40

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Solution

The fourth proportional to 20,158.96, 30,180.12 and 13,131.40 is: 19,659.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,158.96 : 30,180.12 = 13,131.40 : x
  2. Step 2: Convert to fraction form
    20,158.96/30,180.12 = 13,131.40/x
  3. Step 3: Cross multiply
    20,158.96x = 30,180.12 × 13,131.40
  4. Step 4: Simplify right side
    20,158.96x = 396,307,227.77
  5. Step 5: Solve for x
    x = 396,307,227.77/20,158.96
  6. Step 6: Final answer
    x = 19,659.11

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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.