Home / 10,516.73-15,775.10-3,121.30

Finding the Fourth Proportional to 10,516.73, 15,775.10 and 3,121.30

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Solution

The fourth proportional to 10,516.73, 15,775.10 and 3,121.30 is: 4,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,516.73 : 15,775.10 = 3,121.30 : x
  2. Step 2: Convert to fraction form
    10,516.73/15,775.10 = 3,121.30/x
  3. Step 3: Cross multiply
    10,516.73x = 15,775.10 × 3,121.30
  4. Step 4: Simplify right side
    10,516.73x = 49,238,819.63
  5. Step 5: Solve for x
    x = 49,238,819.63/10,516.73
  6. Step 6: Final answer
    x = 4,681.95

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1.5x scale

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.