Home / 20,043.20-27,655.68-11,428.16

Finding the Fourth Proportional to 20,043.20, 27,655.68 and 11,428.16

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Solution

The fourth proportional to 20,043.20, 27,655.68 and 11,428.16 is: 15,768.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,043.20 : 27,655.68 = 11,428.16 : x
  2. Step 2: Convert to fraction form
    20,043.20/27,655.68 = 11,428.16/x
  3. Step 3: Cross multiply
    20,043.20x = 27,655.68 × 11,428.16
  4. Step 4: Simplify right side
    20,043.20x = 316,053,535.95
  5. Step 5: Solve for x
    x = 316,053,535.95/20,043.20
  6. Step 6: Final answer
    x = 15,768.62

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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.