Home / 8,578.20-12,875.40-5,297.70

Finding the Fourth Proportional to 8,578.20, 12,875.40 and 5,297.70

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Solution

The fourth proportional to 8,578.20, 12,875.40 and 5,297.70 is: 7,951.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,578.20 : 12,875.40 = 5,297.70 : x
  2. Step 2: Convert to fraction form
    8,578.20/12,875.40 = 5,297.70/x
  3. Step 3: Cross multiply
    8,578.20x = 12,875.40 × 5,297.70
  4. Step 4: Simplify right side
    8,578.20x = 68,210,006.58
  5. Step 5: Solve for x
    x = 68,210,006.58/8,578.20
  6. Step 6: Final answer
    x = 7,951.55

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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.