Home / 20,306.31-30,438.81-9,220.89

Finding the Fourth Proportional to 20,306.31, 30,438.81 and 9,220.89

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Solution

The fourth proportional to 20,306.31, 30,438.81 and 9,220.89 is: 13,821.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306.31 : 30,438.81 = 9,220.89 : x
  2. Step 2: Convert to fraction form
    20,306.31/30,438.81 = 9,220.89/x
  3. Step 3: Cross multiply
    20,306.31x = 30,438.81 × 9,220.89
  4. Step 4: Simplify right side
    20,306.31x = 280,672,918.74
  5. Step 5: Solve for x
    x = 280,672,918.74/20,306.31
  6. Step 6: Final answer
    x = 13,821.96

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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.