Home / 8,385.51-12,560.36-6,388.95

Finding the Fourth Proportional to 8,385.51, 12,560.36 and 6,388.95

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Solution

The fourth proportional to 8,385.51, 12,560.36 and 6,388.95 is: 9,569.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,385.51 : 12,560.36 = 6,388.95 : x
  2. Step 2: Convert to fraction form
    8,385.51/12,560.36 = 6,388.95/x
  3. Step 3: Cross multiply
    8,385.51x = 12,560.36 × 6,388.95
  4. Step 4: Simplify right side
    8,385.51x = 80,247,480.08
  5. Step 5: Solve for x
    x = 80,247,480.08/8,385.51
  6. Step 6: Final answer
    x = 9,569.78

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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.