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Finding the Fourth Proportional to 8,638.84, 12,941.05 and 6,657.55

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Solution

The fourth proportional to 8,638.84, 12,941.05 and 6,657.55 is: 9,973.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.84 : 12,941.05 = 6,657.55 : x
  2. Step 2: Convert to fraction form
    8,638.84/12,941.05 = 6,657.55/x
  3. Step 3: Cross multiply
    8,638.84x = 12,941.05 × 6,657.55
  4. Step 4: Simplify right side
    8,638.84x = 86,155,687.43
  5. Step 5: Solve for x
    x = 86,155,687.43/8,638.84
  6. Step 6: Final answer
    x = 9,973.06

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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.