Home / 12,876.90-17,770.55-7,572.21

Finding the Fourth Proportional to 12,876.90, 17,770.55 and 7,572.21

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Solution

The fourth proportional to 12,876.90, 17,770.55 and 7,572.21 is: 10,449.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,876.90 : 17,770.55 = 7,572.21 : x
  2. Step 2: Convert to fraction form
    12,876.90/17,770.55 = 7,572.21/x
  3. Step 3: Cross multiply
    12,876.90x = 17,770.55 × 7,572.21
  4. Step 4: Simplify right side
    12,876.90x = 134,562,336.42
  5. Step 5: Solve for x
    x = 134,562,336.42/12,876.90
  6. Step 6: Final answer
    x = 10,449.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.