Home / 12,128.35-18,166.15-7,434.19

Finding the Fourth Proportional to 12,128.35, 18,166.15 and 7,434.19

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Solution

The fourth proportional to 12,128.35, 18,166.15 and 7,434.19 is: 11,135.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.35 : 18,166.15 = 7,434.19 : x
  2. Step 2: Convert to fraction form
    12,128.35/18,166.15 = 7,434.19/x
  3. Step 3: Cross multiply
    12,128.35x = 18,166.15 × 7,434.19
  4. Step 4: Simplify right side
    12,128.35x = 135,050,610.67
  5. Step 5: Solve for x
    x = 135,050,610.67/12,128.35
  6. Step 6: Final answer
    x = 11,135.12

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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.