Home / 5,478.86-7,559.78-3,120.95

Finding the Fourth Proportional to 5,478.86, 7,559.78 and 3,120.95

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Solution

The fourth proportional to 5,478.86, 7,559.78 and 3,120.95 is: 4,306.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.86 : 7,559.78 = 3,120.95 : x
  2. Step 2: Convert to fraction form
    5,478.86/7,559.78 = 3,120.95/x
  3. Step 3: Cross multiply
    5,478.86x = 7,559.78 × 3,120.95
  4. Step 4: Simplify right side
    5,478.86x = 23,593,641.99
  5. Step 5: Solve for x
    x = 23,593,641.99/5,478.86
  6. Step 6: Final answer
    x = 4,306.31

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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.