Home / 20,306.10-30,459.15-7,159.80

Finding the Fourth Proportional to 20,306.10, 30,459.15 and 7,159.80

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Solution

The fourth proportional to 20,306.10, 30,459.15 and 7,159.80 is: 10,739.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306.10 : 30,459.15 = 7,159.80 : x
  2. Step 2: Convert to fraction form
    20,306.10/30,459.15 = 7,159.80/x
  3. Step 3: Cross multiply
    20,306.10x = 30,459.15 × 7,159.80
  4. Step 4: Simplify right side
    20,306.10x = 218,081,422.17
  5. Step 5: Solve for x
    x = 218,081,422.17/20,306.10
  6. Step 6: Final answer
    x = 10,739.70

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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.