Home / 20,242.28-27,931.56-11,288.54

Finding the Fourth Proportional to 20,242.28, 27,931.56 and 11,288.54

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Solution

The fourth proportional to 20,242.28, 27,931.56 and 11,288.54 is: 15,576.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,242.28 : 27,931.56 = 11,288.54 : x
  2. Step 2: Convert to fraction form
    20,242.28/27,931.56 = 11,288.54/x
  3. Step 3: Cross multiply
    20,242.28x = 27,931.56 × 11,288.54
  4. Step 4: Simplify right side
    20,242.28x = 315,306,532.32
  5. Step 5: Solve for x
    x = 315,306,532.32/20,242.28
  6. Step 6: Final answer
    x = 15,576.63

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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.