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Finding the Fourth Proportional to 8,069.40, 12,131.10 and 7,000.20

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Solution

The fourth proportional to 8,069.40, 12,131.10 and 7,000.20 is: 10,523.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,069.40 : 12,131.10 = 7,000.20 : x
  2. Step 2: Convert to fraction form
    8,069.40/12,131.10 = 7,000.20/x
  3. Step 3: Cross multiply
    8,069.40x = 12,131.10 × 7,000.20
  4. Step 4: Simplify right side
    8,069.40x = 84,920,126.22
  5. Step 5: Solve for x
    x = 84,920,126.22/8,069.40
  6. Step 6: Final answer
    x = 10,523.72

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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.