Home / 28,508.74-39,340.90-15,761.11

Finding the Fourth Proportional to 28,508.74, 39,340.90 and 15,761.11

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Solution

The fourth proportional to 28,508.74, 39,340.90 and 15,761.11 is: 21,749.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,508.74 : 39,340.90 = 15,761.11 : x
  2. Step 2: Convert to fraction form
    28,508.74/39,340.90 = 15,761.11/x
  3. Step 3: Cross multiply
    28,508.74x = 39,340.90 × 15,761.11
  4. Step 4: Simplify right side
    28,508.74x = 620,056,173.59
  5. Step 5: Solve for x
    x = 620,056,173.59/28,508.74
  6. Step 6: Final answer
    x = 21,749.69

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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.