Home / 31,339.96-43,220.82-20,740.12

Finding the Fourth Proportional to 31,339.96, 43,220.82 and 20,740.12

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Solution

The fourth proportional to 31,339.96, 43,220.82 and 20,740.12 is: 28,602.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,339.96 : 43,220.82 = 20,740.12 : x
  2. Step 2: Convert to fraction form
    31,339.96/43,220.82 = 20,740.12/x
  3. Step 3: Cross multiply
    31,339.96x = 43,220.82 × 20,740.12
  4. Step 4: Simplify right side
    31,339.96x = 896,404,993.30
  5. Step 5: Solve for x
    x = 896,404,993.30/31,339.96
  6. Step 6: Final answer
    x = 28,602.62

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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.