Home / 15,680.45-21,638.77-8,966.70

Finding the Fourth Proportional to 15,680.45, 21,638.77 and 8,966.70

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Solution

The fourth proportional to 15,680.45, 21,638.77 and 8,966.70 is: 12,373.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,680.45 : 21,638.77 = 8,966.70 : x
  2. Step 2: Convert to fraction form
    15,680.45/21,638.77 = 8,966.70/x
  3. Step 3: Cross multiply
    15,680.45x = 21,638.77 × 8,966.70
  4. Step 4: Simplify right side
    15,680.45x = 194,028,361.76
  5. Step 5: Solve for x
    x = 194,028,361.76/15,680.45
  6. Step 6: Final answer
    x = 12,373.90

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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.