Home / 8,417.60-12,618.40-3,151.20

Finding the Fourth Proportional to 8,417.60, 12,618.40 and 3,151.20

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Solution

The fourth proportional to 8,417.60, 12,618.40 and 3,151.20 is: 4,723.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,417.60 : 12,618.40 = 3,151.20 : x
  2. Step 2: Convert to fraction form
    8,417.60/12,618.40 = 3,151.20/x
  3. Step 3: Cross multiply
    8,417.60x = 12,618.40 × 3,151.20
  4. Step 4: Simplify right side
    8,417.60x = 39,763,102.08
  5. Step 5: Solve for x
    x = 39,763,102.08/8,417.60
  6. Step 6: Final answer
    x = 4,723.81

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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.