Home / 23,131.09-31,920.92-12,520.69

Finding the Fourth Proportional to 23,131.09, 31,920.92 and 12,520.69

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Solution

The fourth proportional to 23,131.09, 31,920.92 and 12,520.69 is: 17,278.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,131.09 : 31,920.92 = 12,520.69 : x
  2. Step 2: Convert to fraction form
    23,131.09/31,920.92 = 12,520.69/x
  3. Step 3: Cross multiply
    23,131.09x = 31,920.92 × 12,520.69
  4. Step 4: Simplify right side
    23,131.09x = 399,671,721.63
  5. Step 5: Solve for x
    x = 399,671,721.63/23,131.09
  6. Step 6: Final answer
    x = 17,278.55

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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.