Home / 10,516.29-15,776.91-3,120.81

Finding the Fourth Proportional to 10,516.29, 15,776.91 and 3,120.81

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Solution

The fourth proportional to 10,516.29, 15,776.91 and 3,120.81 is: 4,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,516.29 : 15,776.91 = 3,120.81 : x
  2. Step 2: Convert to fraction form
    10,516.29/15,776.91 = 3,120.81/x
  3. Step 3: Cross multiply
    10,516.29x = 15,776.91 × 3,120.81
  4. Step 4: Simplify right side
    10,516.29x = 49,236,738.50
  5. Step 5: Solve for x
    x = 49,236,738.50/10,516.29
  6. Step 6: Final answer
    x = 4,681.95

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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.