Home / 20,654.28-31,003.26-12,868.56

Finding the Fourth Proportional to 20,654.28, 31,003.26 and 12,868.56

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Solution

The fourth proportional to 20,654.28, 31,003.26 and 12,868.56 is: 19,316.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,654.28 : 31,003.26 = 12,868.56 : x
  2. Step 2: Convert to fraction form
    20,654.28/31,003.26 = 12,868.56/x
  3. Step 3: Cross multiply
    20,654.28x = 31,003.26 × 12,868.56
  4. Step 4: Simplify right side
    20,654.28x = 398,967,311.51
  5. Step 5: Solve for x
    x = 398,967,311.51/20,654.28
  6. Step 6: Final answer
    x = 19,316.45

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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.