Home / 20,121.96-27,774.18-13,417.32

Finding the Fourth Proportional to 20,121.96, 27,774.18 and 13,417.32

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Solution

The fourth proportional to 20,121.96, 27,774.18 and 13,417.32 is: 18,519.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.96 : 27,774.18 = 13,417.32 : x
  2. Step 2: Convert to fraction form
    20,121.96/27,774.18 = 13,417.32/x
  3. Step 3: Cross multiply
    20,121.96x = 27,774.18 × 13,417.32
  4. Step 4: Simplify right side
    20,121.96x = 372,655,060.80
  5. Step 5: Solve for x
    x = 372,655,060.80/20,121.96
  6. Step 6: Final answer
    x = 18,519.82

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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.