Home / 13,161.98-18,151.78-10,920.31

Finding the Fourth Proportional to 13,161.98, 18,151.78 and 10,920.31

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Solution

The fourth proportional to 13,161.98, 18,151.78 and 10,920.31 is: 15,060.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,161.98 : 18,151.78 = 10,920.31 : x
  2. Step 2: Convert to fraction form
    13,161.98/18,151.78 = 10,920.31/x
  3. Step 3: Cross multiply
    13,161.98x = 18,151.78 × 10,920.31
  4. Step 4: Simplify right side
    13,161.98x = 198,222,919.29
  5. Step 5: Solve for x
    x = 198,222,919.29/13,161.98
  6. Step 6: Final answer
    x = 15,060.27

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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.