Home / 20,156.40-27,812.72-11,203.88

Finding the Fourth Proportional to 20,156.40, 27,812.72 and 11,203.88

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Solution

The fourth proportional to 20,156.40, 27,812.72 and 11,203.88 is: 15,459.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.40 : 27,812.72 = 11,203.88 : x
  2. Step 2: Convert to fraction form
    20,156.40/27,812.72 = 11,203.88/x
  3. Step 3: Cross multiply
    20,156.40x = 27,812.72 × 11,203.88
  4. Step 4: Simplify right side
    20,156.40x = 311,610,377.35
  5. Step 5: Solve for x
    x = 311,610,377.35/20,156.40
  6. Step 6: Final answer
    x = 15,459.62

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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.