Home / 31,338.18-43,248.60-20,709.36

Finding the Fourth Proportional to 31,338.18, 43,248.60 and 20,709.36

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Solution

The fourth proportional to 31,338.18, 43,248.60 and 20,709.36 is: 28,580.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,338.18 : 43,248.60 = 20,709.36 : x
  2. Step 2: Convert to fraction form
    31,338.18/43,248.60 = 20,709.36/x
  3. Step 3: Cross multiply
    31,338.18x = 43,248.60 × 20,709.36
  4. Step 4: Simplify right side
    31,338.18x = 895,650,826.90
  5. Step 5: Solve for x
    x = 895,650,826.90/31,338.18
  6. Step 6: Final answer
    x = 28,580.18

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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.