Home / 10,518.66-15,775.26-3,121.38

Finding the Fourth Proportional to 10,518.66, 15,775.26 and 3,121.38

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Solution

The fourth proportional to 10,518.66, 15,775.26 and 3,121.38 is: 4,681.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,518.66 : 15,775.26 = 3,121.38 : x
  2. Step 2: Convert to fraction form
    10,518.66/15,775.26 = 3,121.38/x
  3. Step 3: Cross multiply
    10,518.66x = 15,775.26 × 3,121.38
  4. Step 4: Simplify right side
    10,518.66x = 49,240,581.06
  5. Step 5: Solve for x
    x = 49,240,581.06/10,518.66
  6. Step 6: Final answer
    x = 4,681.26

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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.