Home / 20,189.16-30,316.68-12,447.18

Finding the Fourth Proportional to 20,189.16, 30,316.68 and 12,447.18

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Solution

The fourth proportional to 20,189.16, 30,316.68 and 12,447.18 is: 18,691.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189.16 : 30,316.68 = 12,447.18 : x
  2. Step 2: Convert to fraction form
    20,189.16/30,316.68 = 12,447.18/x
  3. Step 3: Cross multiply
    20,189.16x = 30,316.68 × 12,447.18
  4. Step 4: Simplify right side
    20,189.16x = 377,357,172.96
  5. Step 5: Solve for x
    x = 377,357,172.96/20,189.16
  6. Step 6: Final answer
    x = 18,691.08

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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.