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Finding the Fourth Proportional to 5,919.20, 8,878.80 and 5,117.30

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Solution

The fourth proportional to 5,919.20, 8,878.80 and 5,117.30 is: 7,675.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,919.20 : 8,878.80 = 5,117.30 : x
  2. Step 2: Convert to fraction form
    5,919.20/8,878.80 = 5,117.30/x
  3. Step 3: Cross multiply
    5,919.20x = 8,878.80 × 5,117.30
  4. Step 4: Simplify right side
    5,919.20x = 45,435,483.24
  5. Step 5: Solve for x
    x = 45,435,483.24/5,919.20
  6. Step 6: Final answer
    x = 7,675.95

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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.