Home / 20,161.42-27,810.61-12,988.97

Finding the Fourth Proportional to 20,161.42, 27,810.61 and 12,988.97

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Solution

The fourth proportional to 20,161.42, 27,810.61 and 12,988.97 is: 17,916.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,161.42 : 27,810.61 = 12,988.97 : x
  2. Step 2: Convert to fraction form
    20,161.42/27,810.61 = 12,988.97/x
  3. Step 3: Cross multiply
    20,161.42x = 27,810.61 × 12,988.97
  4. Step 4: Simplify right side
    20,161.42x = 361,231,178.97
  5. Step 5: Solve for x
    x = 361,231,178.97/20,161.42
  6. Step 6: Final answer
    x = 17,916.95

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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.