Home / 20,440.12-30,655.32-5,648.71

Finding the Fourth Proportional to 20,440.12, 30,655.32 and 5,648.71

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Solution

The fourth proportional to 20,440.12, 30,655.32 and 5,648.71 is: 8,471.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.12 : 30,655.32 = 5,648.71 : x
  2. Step 2: Convert to fraction form
    20,440.12/30,655.32 = 5,648.71/x
  3. Step 3: Cross multiply
    20,440.12x = 30,655.32 × 5,648.71
  4. Step 4: Simplify right side
    20,440.12x = 173,163,012.64
  5. Step 5: Solve for x
    x = 173,163,012.64/20,440.12
  6. Step 6: Final answer
    x = 8,471.72

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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.