Home / 15,531.44-21,432.71-8,816.94

Finding the Fourth Proportional to 15,531.44, 21,432.71 and 8,816.94

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Solution

The fourth proportional to 15,531.44, 21,432.71 and 8,816.94 is: 12,166.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.44 : 21,432.71 = 8,816.94 : x
  2. Step 2: Convert to fraction form
    15,531.44/21,432.71 = 8,816.94/x
  3. Step 3: Cross multiply
    15,531.44x = 21,432.71 × 8,816.94
  4. Step 4: Simplify right side
    15,531.44x = 188,970,874.02
  5. Step 5: Solve for x
    x = 188,970,874.02/15,531.44
  6. Step 6: Final answer
    x = 12,166.99

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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.