Home / 5,585.60-8,378.40-2,811.20

Finding the Fourth Proportional to 5,585.60, 8,378.40 and 2,811.20

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Solution

The fourth proportional to 5,585.60, 8,378.40 and 2,811.20 is: 4,216.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,585.60 : 8,378.40 = 2,811.20 : x
  2. Step 2: Convert to fraction form
    5,585.60/8,378.40 = 2,811.20/x
  3. Step 3: Cross multiply
    5,585.60x = 8,378.40 × 2,811.20
  4. Step 4: Simplify right side
    5,585.60x = 23,553,358.08
  5. Step 5: Solve for x
    x = 23,553,358.08/5,585.60
  6. Step 6: Final answer
    x = 4,216.80

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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.