Home / 7,478.31-11,217.89-3,776.20

Finding the Fourth Proportional to 7,478.31, 11,217.89 and 3,776.20

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Solution

The fourth proportional to 7,478.31, 11,217.89 and 3,776.20 is: 5,664.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.31 : 11,217.89 = 3,776.20 : x
  2. Step 2: Convert to fraction form
    7,478.31/11,217.89 = 3,776.20/x
  3. Step 3: Cross multiply
    7,478.31x = 11,217.89 × 3,776.20
  4. Step 4: Simplify right side
    7,478.31x = 42,360,996.22
  5. Step 5: Solve for x
    x = 42,360,996.22/7,478.31
  6. Step 6: Final answer
    x = 5,664.51

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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.