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Finding the Fourth Proportional to 7,108.60, 10,663.70 and 2,178.20

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Solution

The fourth proportional to 7,108.60, 10,663.70 and 2,178.20 is: 3,267.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.60 : 10,663.70 = 2,178.20 : x
  2. Step 2: Convert to fraction form
    7,108.60/10,663.70 = 2,178.20/x
  3. Step 3: Cross multiply
    7,108.60x = 10,663.70 × 2,178.20
  4. Step 4: Simplify right side
    7,108.60x = 23,227,671.34
  5. Step 5: Solve for x
    x = 23,227,671.34/7,108.60
  6. Step 6: Final answer
    x = 3,267.55

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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.