Home / 28,294.28-39,047.28-15,719

Finding the Fourth Proportional to 28,294.28, 39,047.28 and 15,719

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Solution

The fourth proportional to 28,294.28, 39,047.28 and 15,719 is: 21,692.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,294.28 : 39,047.28 = 15,719 : x
  2. Step 2: Convert to fraction form
    28,294.28/39,047.28 = 15,719/x
  3. Step 3: Cross multiply
    28,294.28x = 39,047.28 × 15,719
  4. Step 4: Simplify right side
    28,294.28x = 613,784,194.32
  5. Step 5: Solve for x
    x = 613,784,194.32/28,294.28
  6. Step 6: Final answer
    x = 21,692.87

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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.