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Finding the Fourth Proportional to 8,664.90, 12,985.20 and 6,064.80

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Solution

The fourth proportional to 8,664.90, 12,985.20 and 6,064.80 is: 9,088.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.90 : 12,985.20 = 6,064.80 : x
  2. Step 2: Convert to fraction form
    8,664.90/12,985.20 = 6,064.80/x
  3. Step 3: Cross multiply
    8,664.90x = 12,985.20 × 6,064.80
  4. Step 4: Simplify right side
    8,664.90x = 78,752,640.96
  5. Step 5: Solve for x
    x = 78,752,640.96/8,664.90
  6. Step 6: Final answer
    x = 9,088.70

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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.