Home / 20,306.88-28,020.72-11,353.92

Finding the Fourth Proportional to 20,306.88, 28,020.72 and 11,353.92

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Solution

The fourth proportional to 20,306.88, 28,020.72 and 11,353.92 is: 15,666.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306.88 : 28,020.72 = 11,353.92 : x
  2. Step 2: Convert to fraction form
    20,306.88/28,020.72 = 11,353.92/x
  3. Step 3: Cross multiply
    20,306.88x = 28,020.72 × 11,353.92
  4. Step 4: Simplify right side
    20,306.88x = 318,145,013.22
  5. Step 5: Solve for x
    x = 318,145,013.22/20,306.88
  6. Step 6: Final answer
    x = 15,666.86

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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.