Home / 15,145.68-20,901.12-8,856.72

Finding the Fourth Proportional to 15,145.68, 20,901.12 and 8,856.72

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Solution

The fourth proportional to 15,145.68, 20,901.12 and 8,856.72 is: 12,222.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.68 : 20,901.12 = 8,856.72 : x
  2. Step 2: Convert to fraction form
    15,145.68/20,901.12 = 8,856.72/x
  3. Step 3: Cross multiply
    15,145.68x = 20,901.12 × 8,856.72
  4. Step 4: Simplify right side
    15,145.68x = 185,115,367.53
  5. Step 5: Solve for x
    x = 185,115,367.53/15,145.68
  6. Step 6: Final answer
    x = 12,222.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.