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Finding the Fourth Proportional to 9,625.70, 13,278.40 and 6,636.40

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Solution

The fourth proportional to 9,625.70, 13,278.40 and 6,636.40 is: 9,154.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,625.70 : 13,278.40 = 6,636.40 : x
  2. Step 2: Convert to fraction form
    9,625.70/13,278.40 = 6,636.40/x
  3. Step 3: Cross multiply
    9,625.70x = 13,278.40 × 6,636.40
  4. Step 4: Simplify right side
    9,625.70x = 88,120,773.76
  5. Step 5: Solve for x
    x = 88,120,773.76/9,625.70
  6. Step 6: Final answer
    x = 9,154.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.