Home / 20,270.10-27,972.29-11,318.45

Finding the Fourth Proportional to 20,270.10, 27,972.29 and 11,318.45

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Solution

The fourth proportional to 20,270.10, 27,972.29 and 11,318.45 is: 15,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,270.10 : 27,972.29 = 11,318.45 : x
  2. Step 2: Convert to fraction form
    20,270.10/27,972.29 = 11,318.45/x
  3. Step 3: Cross multiply
    20,270.10x = 27,972.29 × 11,318.45
  4. Step 4: Simplify right side
    20,270.10x = 316,602,769.30
  5. Step 5: Solve for x
    x = 316,602,769.30/20,270.10
  6. Step 6: Final answer
    x = 15,619.20

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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.