Home / 8,319.51-12,479.37-3,385.70

Finding the Fourth Proportional to 8,319.51, 12,479.37 and 3,385.70

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Solution

The fourth proportional to 8,319.51, 12,479.37 and 3,385.70 is: 5,078.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319.51 : 12,479.37 = 3,385.70 : x
  2. Step 2: Convert to fraction form
    8,319.51/12,479.37 = 3,385.70/x
  3. Step 3: Cross multiply
    8,319.51x = 12,479.37 × 3,385.70
  4. Step 4: Simplify right side
    8,319.51x = 42,251,374.71
  5. Step 5: Solve for x
    x = 42,251,374.71/8,319.51
  6. Step 6: Final answer
    x = 5,078.59

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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.