Home / 20,687.04-28,549.78-11,612.20

Finding the Fourth Proportional to 20,687.04, 28,549.78 and 11,612.20

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Solution

The fourth proportional to 20,687.04, 28,549.78 and 11,612.20 is: 16,025.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.04 : 28,549.78 = 11,612.20 : x
  2. Step 2: Convert to fraction form
    20,687.04/28,549.78 = 11,612.20/x
  3. Step 3: Cross multiply
    20,687.04x = 28,549.78 × 11,612.20
  4. Step 4: Simplify right side
    20,687.04x = 331,525,755.32
  5. Step 5: Solve for x
    x = 331,525,755.32/20,687.04
  6. Step 6: Final answer
    x = 16,025.77

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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.