Home / 10,920.10-16,380.15-9,969.70

Finding the Fourth Proportional to 10,920.10, 16,380.15 and 9,969.70

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Solution

The fourth proportional to 10,920.10, 16,380.15 and 9,969.70 is: 14,954.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.10 : 16,380.15 = 9,969.70 : x
  2. Step 2: Convert to fraction form
    10,920.10/16,380.15 = 9,969.70/x
  3. Step 3: Cross multiply
    10,920.10x = 16,380.15 × 9,969.70
  4. Step 4: Simplify right side
    10,920.10x = 163,305,181.46
  5. Step 5: Solve for x
    x = 163,305,181.46/10,920.10
  6. Step 6: Final answer
    x = 14,954.55

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1.5x scale

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.