Home / 12,129.13-16,742.87-9,342.73

Finding the Fourth Proportional to 12,129.13, 16,742.87 and 9,342.73

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Solution

The fourth proportional to 12,129.13, 16,742.87 and 9,342.73 is: 12,896.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.13 : 16,742.87 = 9,342.73 : x
  2. Step 2: Convert to fraction form
    12,129.13/16,742.87 = 9,342.73/x
  3. Step 3: Cross multiply
    12,129.13x = 16,742.87 × 9,342.73
  4. Step 4: Simplify right side
    12,129.13x = 156,424,113.84
  5. Step 5: Solve for x
    x = 156,424,113.84/12,129.13
  6. Step 6: Final answer
    x = 12,896.57

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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.