Home / 13,121.51-18,108.11-7,456.16

Finding the Fourth Proportional to 13,121.51, 18,108.11 and 7,456.16

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Solution

The fourth proportional to 13,121.51, 18,108.11 and 7,456.16 is: 10,289.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.51 : 18,108.11 = 7,456.16 : x
  2. Step 2: Convert to fraction form
    13,121.51/18,108.11 = 7,456.16/x
  3. Step 3: Cross multiply
    13,121.51x = 18,108.11 × 7,456.16
  4. Step 4: Simplify right side
    13,121.51x = 135,016,965.46
  5. Step 5: Solve for x
    x = 135,016,965.46/13,121.51
  6. Step 6: Final answer
    x = 10,289.74

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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.