Home / 20,639.61-30,970.35-8,961.03

Finding the Fourth Proportional to 20,639.61, 30,970.35 and 8,961.03

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Solution

The fourth proportional to 20,639.61, 30,970.35 and 8,961.03 is: 13,446.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.61 : 30,970.35 = 8,961.03 : x
  2. Step 2: Convert to fraction form
    20,639.61/30,970.35 = 8,961.03/x
  3. Step 3: Cross multiply
    20,639.61x = 30,970.35 × 8,961.03
  4. Step 4: Simplify right side
    20,639.61x = 277,526,235.46
  5. Step 5: Solve for x
    x = 277,526,235.46/20,639.61
  6. Step 6: Final answer
    x = 13,446.29

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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.