Home / 8,621.60-12,934.40-2,778

Finding the Fourth Proportional to 8,621.60, 12,934.40 and 2,778

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Solution

The fourth proportional to 8,621.60, 12,934.40 and 2,778 is: 4,167.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,621.60 : 12,934.40 = 2,778 : x
  2. Step 2: Convert to fraction form
    8,621.60/12,934.40 = 2,778/x
  3. Step 3: Cross multiply
    8,621.60x = 12,934.40 × 2,778
  4. Step 4: Simplify right side
    8,621.60x = 35,931,763.20
  5. Step 5: Solve for x
    x = 35,931,763.20/8,621.60
  6. Step 6: Final answer
    x = 4,167.64

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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.