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Finding the Fourth Proportional to 8,422.88, 12,636.57 and 7,504.74

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Solution

The fourth proportional to 8,422.88, 12,636.57 and 7,504.74 is: 11,259.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,422.88 : 12,636.57 = 7,504.74 : x
  2. Step 2: Convert to fraction form
    8,422.88/12,636.57 = 7,504.74/x
  3. Step 3: Cross multiply
    8,422.88x = 12,636.57 × 7,504.74
  4. Step 4: Simplify right side
    8,422.88x = 94,834,172.34
  5. Step 5: Solve for x
    x = 94,834,172.34/8,422.88
  6. Step 6: Final answer
    x = 11,259.12

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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.