Home / 20,319.00-28,040.31-11,366.49

Finding the Fourth Proportional to 20,319.00, 28,040.31 and 11,366.49

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Solution

The fourth proportional to 20,319.00, 28,040.31 and 11,366.49 is: 15,685.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.00 : 28,040.31 = 11,366.49 : x
  2. Step 2: Convert to fraction form
    20,319.00/28,040.31 = 11,366.49/x
  3. Step 3: Cross multiply
    20,319.00x = 28,040.31 × 11,366.49
  4. Step 4: Simplify right side
    20,319.00x = 318,720,008.36
  5. Step 5: Solve for x
    x = 318,720,008.36/20,319.00
  6. Step 6: Final answer
    x = 15,685.81

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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.