Home / 8,439.36-12,663.36-3,821.76

Finding the Fourth Proportional to 8,439.36, 12,663.36 and 3,821.76

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Solution

The fourth proportional to 8,439.36, 12,663.36 and 3,821.76 is: 5,734.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.36 : 12,663.36 = 3,821.76 : x
  2. Step 2: Convert to fraction form
    8,439.36/12,663.36 = 3,821.76/x
  3. Step 3: Cross multiply
    8,439.36x = 12,663.36 × 3,821.76
  4. Step 4: Simplify right side
    8,439.36x = 48,396,322.71
  5. Step 5: Solve for x
    x = 48,396,322.71/8,439.36
  6. Step 6: Final answer
    x = 5,734.60

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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.