Home / 20,488.35-30,731.31-7,160.41

Finding the Fourth Proportional to 20,488.35, 30,731.31 and 7,160.41

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Solution

The fourth proportional to 20,488.35, 30,731.31 and 7,160.41 is: 10,740.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.35 : 30,731.31 = 7,160.41 : x
  2. Step 2: Convert to fraction form
    20,488.35/30,731.31 = 7,160.41/x
  3. Step 3: Cross multiply
    20,488.35x = 30,731.31 × 7,160.41
  4. Step 4: Simplify right side
    20,488.35x = 220,048,702.61
  5. Step 5: Solve for x
    x = 220,048,702.61/20,488.35
  6. Step 6: Final answer
    x = 10,740.19

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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.