Home / 21,981.60-30,333.90-12,550.16

Finding the Fourth Proportional to 21,981.60, 30,333.90 and 12,550.16

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Solution

The fourth proportional to 21,981.60, 30,333.90 and 12,550.16 is: 17,318.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.60 : 30,333.90 = 12,550.16 : x
  2. Step 2: Convert to fraction form
    21,981.60/30,333.90 = 12,550.16/x
  3. Step 3: Cross multiply
    21,981.60x = 30,333.90 × 12,550.16
  4. Step 4: Simplify right side
    21,981.60x = 380,695,213.44
  5. Step 5: Solve for x
    x = 380,695,213.44/21,981.60
  6. Step 6: Final answer
    x = 17,318.82

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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.