Home / 10,516.28-15,774.30-3,120.80

Finding the Fourth Proportional to 10,516.28, 15,774.30 and 3,120.80

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Solution

The fourth proportional to 10,516.28, 15,774.30 and 3,120.80 is: 4,681.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,516.28 : 15,774.30 = 3,120.80 : x
  2. Step 2: Convert to fraction form
    10,516.28/15,774.30 = 3,120.80/x
  3. Step 3: Cross multiply
    10,516.28x = 15,774.30 × 3,120.80
  4. Step 4: Simplify right side
    10,516.28x = 49,228,356.57
  5. Step 5: Solve for x
    x = 49,228,356.57/10,516.28
  6. Step 6: Final answer
    x = 4,681.16

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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.