Home / 20,995.28-31,503.84-9,305.76

Finding the Fourth Proportional to 20,995.28, 31,503.84 and 9,305.76

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Solution

The fourth proportional to 20,995.28, 31,503.84 and 9,305.76 is: 13,963.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.28 : 31,503.84 = 9,305.76 : x
  2. Step 2: Convert to fraction form
    20,995.28/31,503.84 = 9,305.76/x
  3. Step 3: Cross multiply
    20,995.28x = 31,503.84 × 9,305.76
  4. Step 4: Simplify right side
    20,995.28x = 293,167,174.12
  5. Step 5: Solve for x
    x = 293,167,174.12/20,995.28
  6. Step 6: Final answer
    x = 13,963.48

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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.