Home / 20,708.68-31,012.38-10,856.20

Finding the Fourth Proportional to 20,708.68, 31,012.38 and 10,856.20

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Solution

The fourth proportional to 20,708.68, 31,012.38 and 10,856.20 is: 16,257.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.68 : 31,012.38 = 10,856.20 : x
  2. Step 2: Convert to fraction form
    20,708.68/31,012.38 = 10,856.20/x
  3. Step 3: Cross multiply
    20,708.68x = 31,012.38 × 10,856.20
  4. Step 4: Simplify right side
    20,708.68x = 336,676,599.76
  5. Step 5: Solve for x
    x = 336,676,599.76/20,708.68
  6. Step 6: Final answer
    x = 16,257.75

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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.