Home / 20,140.30-27,798.06-11,190.88

Finding the Fourth Proportional to 20,140.30, 27,798.06 and 11,190.88

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Solution

The fourth proportional to 20,140.30, 27,798.06 and 11,190.88 is: 15,445.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.30 : 27,798.06 = 11,190.88 : x
  2. Step 2: Convert to fraction form
    20,140.30/27,798.06 = 11,190.88/x
  3. Step 3: Cross multiply
    20,140.30x = 27,798.06 × 11,190.88
  4. Step 4: Simplify right side
    20,140.30x = 311,084,753.69
  5. Step 5: Solve for x
    x = 311,084,753.69/20,140.30
  6. Step 6: Final answer
    x = 15,445.88

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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.