Home / 10,139.92-15,212.12-3,120.56

Finding the Fourth Proportional to 10,139.92, 15,212.12 and 3,120.56

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Solution

The fourth proportional to 10,139.92, 15,212.12 and 3,120.56 is: 4,681.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,139.92 : 15,212.12 = 3,120.56 : x
  2. Step 2: Convert to fraction form
    10,139.92/15,212.12 = 3,120.56/x
  3. Step 3: Cross multiply
    10,139.92x = 15,212.12 × 3,120.56
  4. Step 4: Simplify right side
    10,139.92x = 47,470,333.19
  5. Step 5: Solve for x
    x = 47,470,333.19/10,139.92
  6. Step 6: Final answer
    x = 4,681.53

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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.