Home / 28,294.40-39,045.12-15,719.96

Finding the Fourth Proportional to 28,294.40, 39,045.12 and 15,719.96

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Solution

The fourth proportional to 28,294.40, 39,045.12 and 15,719.96 is: 21,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,294.40 : 39,045.12 = 15,719.96 : x
  2. Step 2: Convert to fraction form
    28,294.40/39,045.12 = 15,719.96/x
  3. Step 3: Cross multiply
    28,294.40x = 39,045.12 × 15,719.96
  4. Step 4: Simplify right side
    28,294.40x = 613,787,724.60
  5. Step 5: Solve for x
    x = 613,787,724.60/28,294.40
  6. Step 6: Final answer
    x = 21,692.90

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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.