Home / 5,815.20-8,722.80-1,919.10

Finding the Fourth Proportional to 5,815.20, 8,722.80 and 1,919.10

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Solution

The fourth proportional to 5,815.20, 8,722.80 and 1,919.10 is: 2,878.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,815.20 : 8,722.80 = 1,919.10 : x
  2. Step 2: Convert to fraction form
    5,815.20/8,722.80 = 1,919.10/x
  3. Step 3: Cross multiply
    5,815.20x = 8,722.80 × 1,919.10
  4. Step 4: Simplify right side
    5,815.20x = 16,739,925.48
  5. Step 5: Solve for x
    x = 16,739,925.48/5,815.20
  6. Step 6: Final answer
    x = 2,878.65

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Similar ratio
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1.5x scale

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.