Home / 36,921.28-55,347.36-20,470.72

Finding the Fourth Proportional to 36,921.28, 55,347.36 and 20,470.72

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Solution

The fourth proportional to 36,921.28, 55,347.36 and 20,470.72 is: 30,686.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,921.28 : 55,347.36 = 20,470.72 : x
  2. Step 2: Convert to fraction form
    36,921.28/55,347.36 = 20,470.72/x
  3. Step 3: Cross multiply
    36,921.28x = 55,347.36 × 20,470.72
  4. Step 4: Simplify right side
    36,921.28x = 1,133,000,309.30
  5. Step 5: Solve for x
    x = 1,133,000,309.30/36,921.28
  6. Step 6: Final answer
    x = 30,686.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.