Home / 27,780.68-38,335.02-15,843.80

Finding the Fourth Proportional to 27,780.68, 38,335.02 and 15,843.80

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Solution

The fourth proportional to 27,780.68, 38,335.02 and 15,843.80 is: 21,863.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,780.68 : 38,335.02 = 15,843.80 : x
  2. Step 2: Convert to fraction form
    27,780.68/38,335.02 = 15,843.80/x
  3. Step 3: Cross multiply
    27,780.68x = 38,335.02 × 15,843.80
  4. Step 4: Simplify right side
    27,780.68x = 607,372,389.88
  5. Step 5: Solve for x
    x = 607,372,389.88/27,780.68
  6. Step 6: Final answer
    x = 21,863.12

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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.