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Finding the Fourth Proportional to 7,127.40, 10,691.10 and 4,211.40

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Solution

The fourth proportional to 7,127.40, 10,691.10 and 4,211.40 is: 6,317.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,127.40 : 10,691.10 = 4,211.40 : x
  2. Step 2: Convert to fraction form
    7,127.40/10,691.10 = 4,211.40/x
  3. Step 3: Cross multiply
    7,127.40x = 10,691.10 × 4,211.40
  4. Step 4: Simplify right side
    7,127.40x = 45,024,498.54
  5. Step 5: Solve for x
    x = 45,024,498.54/7,127.40
  6. Step 6: Final answer
    x = 6,317.10

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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.