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Finding the Fourth Proportional to 8,752, 13,128 and 8,531.68

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Solution

The fourth proportional to 8,752, 13,128 and 8,531.68 is: 12,797.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,752 : 13,128 = 8,531.68 : x
  2. Step 2: Convert to fraction form
    8,752/13,128 = 8,531.68/x
  3. Step 3: Cross multiply
    8,752x = 13,128 × 8,531.68
  4. Step 4: Simplify right side
    8,752x = 112,003,895.04
  5. Step 5: Solve for x
    x = 112,003,895.04/8,752
  6. Step 6: Final answer
    x = 12,797.52

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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.