Home / 5,417.20-8,109.60-4,769.20

Finding the Fourth Proportional to 5,417.20, 8,109.60 and 4,769.20

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Solution

The fourth proportional to 5,417.20, 8,109.60 and 4,769.20 is: 7,139.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,417.20 : 8,109.60 = 4,769.20 : x
  2. Step 2: Convert to fraction form
    5,417.20/8,109.60 = 4,769.20/x
  3. Step 3: Cross multiply
    5,417.20x = 8,109.60 × 4,769.20
  4. Step 4: Simplify right side
    5,417.20x = 38,676,304.32
  5. Step 5: Solve for x
    x = 38,676,304.32/5,417.20
  6. Step 6: Final answer
    x = 7,139.54

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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.