Home / 20,373.84-28,115.70-11,421.42

Finding the Fourth Proportional to 20,373.84, 28,115.70 and 11,421.42

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Solution

The fourth proportional to 20,373.84, 28,115.70 and 11,421.42 is: 15,761.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,373.84 : 28,115.70 = 11,421.42 : x
  2. Step 2: Convert to fraction form
    20,373.84/28,115.70 = 11,421.42/x
  3. Step 3: Cross multiply
    20,373.84x = 28,115.70 × 11,421.42
  4. Step 4: Simplify right side
    20,373.84x = 321,121,218.29
  5. Step 5: Solve for x
    x = 321,121,218.29/20,373.84
  6. Step 6: Final answer
    x = 15,761.45

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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.