Home / 20,490.68-28,277.54-12,107.20

Finding the Fourth Proportional to 20,490.68, 28,277.54 and 12,107.20

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Solution

The fourth proportional to 20,490.68, 28,277.54 and 12,107.20 is: 16,708.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.68 : 28,277.54 = 12,107.20 : x
  2. Step 2: Convert to fraction form
    20,490.68/28,277.54 = 12,107.20/x
  3. Step 3: Cross multiply
    20,490.68x = 28,277.54 × 12,107.20
  4. Step 4: Simplify right side
    20,490.68x = 342,361,832.29
  5. Step 5: Solve for x
    x = 342,361,832.29/20,490.68
  6. Step 6: Final answer
    x = 16,708.17

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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.