Home / 20,869.89-31,306.67-9,180.38

Finding the Fourth Proportional to 20,869.89, 31,306.67 and 9,180.38

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Solution

The fourth proportional to 20,869.89, 31,306.67 and 9,180.38 is: 13,771.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.89 : 31,306.67 = 9,180.38 : x
  2. Step 2: Convert to fraction form
    20,869.89/31,306.67 = 9,180.38/x
  3. Step 3: Cross multiply
    20,869.89x = 31,306.67 × 9,180.38
  4. Step 4: Simplify right side
    20,869.89x = 287,406,924.70
  5. Step 5: Solve for x
    x = 287,406,924.70/20,869.89
  6. Step 6: Final answer
    x = 13,771.37

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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.