Home / 15,769.98-21,781.95-11,808.78

Finding the Fourth Proportional to 15,769.98, 21,781.95 and 11,808.78

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Solution

The fourth proportional to 15,769.98, 21,781.95 and 11,808.78 is: 16,310.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,769.98 : 21,781.95 = 11,808.78 : x
  2. Step 2: Convert to fraction form
    15,769.98/21,781.95 = 11,808.78/x
  3. Step 3: Cross multiply
    15,769.98x = 21,781.95 × 11,808.78
  4. Step 4: Simplify right side
    15,769.98x = 257,218,255.52
  5. Step 5: Solve for x
    x = 257,218,255.52/15,769.98
  6. Step 6: Final answer
    x = 16,310.63

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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.