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Finding the Fourth Proportional to 6,687.60, 10,031.40 and 6,590.40

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Solution

The fourth proportional to 6,687.60, 10,031.40 and 6,590.40 is: 9,885.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,687.60 : 10,031.40 = 6,590.40 : x
  2. Step 2: Convert to fraction form
    6,687.60/10,031.40 = 6,590.40/x
  3. Step 3: Cross multiply
    6,687.60x = 10,031.40 × 6,590.40
  4. Step 4: Simplify right side
    6,687.60x = 66,110,938.56
  5. Step 5: Solve for x
    x = 66,110,938.56/6,687.60
  6. Step 6: Final answer
    x = 9,885.60

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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.