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Finding the Fourth Proportional to 8,681.34, 12,959.16 and 7,630.41

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Solution

The fourth proportional to 8,681.34, 12,959.16 and 7,630.41 is: 11,390.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,681.34 : 12,959.16 = 7,630.41 : x
  2. Step 2: Convert to fraction form
    8,681.34/12,959.16 = 7,630.41/x
  3. Step 3: Cross multiply
    8,681.34x = 12,959.16 × 7,630.41
  4. Step 4: Simplify right side
    8,681.34x = 98,883,704.06
  5. Step 5: Solve for x
    x = 98,883,704.06/8,681.34
  6. Step 6: Final answer
    x = 11,390.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.