Home / 10,521.72-15,774.48-3,947.76

Finding the Fourth Proportional to 10,521.72, 15,774.48 and 3,947.76

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Solution

The fourth proportional to 10,521.72, 15,774.48 and 3,947.76 is: 5,918.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.72 : 15,774.48 = 3,947.76 : x
  2. Step 2: Convert to fraction form
    10,521.72/15,774.48 = 3,947.76/x
  3. Step 3: Cross multiply
    10,521.72x = 15,774.48 × 3,947.76
  4. Step 4: Simplify right side
    10,521.72x = 62,273,861.16
  5. Step 5: Solve for x
    x = 62,273,861.16/10,521.72
  6. Step 6: Final answer
    x = 5,918.60

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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.