Home / 10,920.52-16,380.60-3,129.16

Finding the Fourth Proportional to 10,920.52, 16,380.60 and 3,129.16

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Solution

The fourth proportional to 10,920.52, 16,380.60 and 3,129.16 is: 4,693.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.52 : 16,380.60 = 3,129.16 : x
  2. Step 2: Convert to fraction form
    10,920.52/16,380.60 = 3,129.16/x
  3. Step 3: Cross multiply
    10,920.52x = 16,380.60 × 3,129.16
  4. Step 4: Simplify right side
    10,920.52x = 51,257,518.30
  5. Step 5: Solve for x
    x = 51,257,518.30/10,920.52
  6. Step 6: Final answer
    x = 4,693.69

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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.