Home / 10,191.42-15,287.14-8,207.75

Finding the Fourth Proportional to 10,191.42, 15,287.14 and 8,207.75

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Solution

The fourth proportional to 10,191.42, 15,287.14 and 8,207.75 is: 12,311.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,191.42 : 15,287.14 = 8,207.75 : x
  2. Step 2: Convert to fraction form
    10,191.42/15,287.14 = 8,207.75/x
  3. Step 3: Cross multiply
    10,191.42x = 15,287.14 × 8,207.75
  4. Step 4: Simplify right side
    10,191.42x = 125,473,071.81
  5. Step 5: Solve for x
    x = 125,473,071.81/10,191.42
  6. Step 6: Final answer
    x = 12,311.64

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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.