Home / 10,612.20-15,920.10-3,216.60

Finding the Fourth Proportional to 10,612.20, 15,920.10 and 3,216.60

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Solution

The fourth proportional to 10,612.20, 15,920.10 and 3,216.60 is: 4,825.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,612.20 : 15,920.10 = 3,216.60 : x
  2. Step 2: Convert to fraction form
    10,612.20/15,920.10 = 3,216.60/x
  3. Step 3: Cross multiply
    10,612.20x = 15,920.10 × 3,216.60
  4. Step 4: Simplify right side
    10,612.20x = 51,208,593.66
  5. Step 5: Solve for x
    x = 51,208,593.66/10,612.20
  6. Step 6: Final answer
    x = 4,825.45

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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.