Home / 20,306.61-30,459.92-13,379.49

Finding the Fourth Proportional to 20,306.61, 30,459.92 and 13,379.49

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Solution

The fourth proportional to 20,306.61, 30,459.92 and 13,379.49 is: 20,069.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306.61 : 30,459.92 = 13,379.49 : x
  2. Step 2: Convert to fraction form
    20,306.61/30,459.92 = 13,379.49/x
  3. Step 3: Cross multiply
    20,306.61x = 30,459.92 × 13,379.49
  4. Step 4: Simplify right side
    20,306.61x = 407,538,128.14
  5. Step 5: Solve for x
    x = 407,538,128.14/20,306.61
  6. Step 6: Final answer
    x = 20,069.24

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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.