Home / 5,417.60-8,120.80-2,947.20

Finding the Fourth Proportional to 5,417.60, 8,120.80 and 2,947.20

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Solution

The fourth proportional to 5,417.60, 8,120.80 and 2,947.20 is: 4,417.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,417.60 : 8,120.80 = 2,947.20 : x
  2. Step 2: Convert to fraction form
    5,417.60/8,120.80 = 2,947.20/x
  3. Step 3: Cross multiply
    5,417.60x = 8,120.80 × 2,947.20
  4. Step 4: Simplify right side
    5,417.60x = 23,933,621.76
  5. Step 5: Solve for x
    x = 23,933,621.76/5,417.60
  6. Step 6: Final answer
    x = 4,417.75

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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.