Home / 13,478.75-20,290.92-12,122.47

Finding the Fourth Proportional to 13,478.75, 20,290.92 and 12,122.47

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Solution

The fourth proportional to 13,478.75, 20,290.92 and 12,122.47 is: 18,249.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.75 : 20,290.92 = 12,122.47 : x
  2. Step 2: Convert to fraction form
    13,478.75/20,290.92 = 12,122.47/x
  3. Step 3: Cross multiply
    13,478.75x = 20,290.92 × 12,122.47
  4. Step 4: Simplify right side
    13,478.75x = 245,976,094.46
  5. Step 5: Solve for x
    x = 245,976,094.46/13,478.75
  6. Step 6: Final answer
    x = 18,249.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.