Home / 31,543.28-43,548.12-20,947.44

Finding the Fourth Proportional to 31,543.28, 43,548.12 and 20,947.44

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Solution

The fourth proportional to 31,543.28, 43,548.12 and 20,947.44 is: 28,919.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,543.28 : 43,548.12 = 20,947.44 : x
  2. Step 2: Convert to fraction form
    31,543.28/43,548.12 = 20,947.44/x
  3. Step 3: Cross multiply
    31,543.28x = 43,548.12 × 20,947.44
  4. Step 4: Simplify right side
    31,543.28x = 912,221,630.81
  5. Step 5: Solve for x
    x = 912,221,630.81/31,543.28
  6. Step 6: Final answer
    x = 28,919.68

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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.