Home / 13,134.51-18,128.66-8,659.05

Finding the Fourth Proportional to 13,134.51, 18,128.66 and 8,659.05

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Solution

The fourth proportional to 13,134.51, 18,128.66 and 8,659.05 is: 11,951.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,134.51 : 18,128.66 = 8,659.05 : x
  2. Step 2: Convert to fraction form
    13,134.51/18,128.66 = 8,659.05/x
  3. Step 3: Cross multiply
    13,134.51x = 18,128.66 × 8,659.05
  4. Step 4: Simplify right side
    13,134.51x = 156,976,930.08
  5. Step 5: Solve for x
    x = 156,976,930.08/13,134.51
  6. Step 6: Final answer
    x = 11,951.49

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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.