Home / 12,555.20-17,318.76-8,077.52

Finding the Fourth Proportional to 12,555.20, 17,318.76 and 8,077.52

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Solution

The fourth proportional to 12,555.20, 17,318.76 and 8,077.52 is: 11,142.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,555.20 : 17,318.76 = 8,077.52 : x
  2. Step 2: Convert to fraction form
    12,555.20/17,318.76 = 8,077.52/x
  3. Step 3: Cross multiply
    12,555.20x = 17,318.76 × 8,077.52
  4. Step 4: Simplify right side
    12,555.20x = 139,892,630.28
  5. Step 5: Solve for x
    x = 139,892,630.28/12,555.20
  6. Step 6: Final answer
    x = 11,142.21

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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.