Home / 8,531.05-12,788.48-2,980.78

Finding the Fourth Proportional to 8,531.05, 12,788.48 and 2,980.78

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Solution

The fourth proportional to 8,531.05, 12,788.48 and 2,980.78 is: 4,468.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,531.05 : 12,788.48 = 2,980.78 : x
  2. Step 2: Convert to fraction form
    8,531.05/12,788.48 = 2,980.78/x
  3. Step 3: Cross multiply
    8,531.05x = 12,788.48 × 2,980.78
  4. Step 4: Simplify right side
    8,531.05x = 38,119,692.83
  5. Step 5: Solve for x
    x = 38,119,692.83/8,531.05
  6. Step 6: Final answer
    x = 4,468.35

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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.