Home / 27,681.40-38,199.90-15,105.88

Finding the Fourth Proportional to 27,681.40, 38,199.90 and 15,105.88

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Solution

The fourth proportional to 27,681.40, 38,199.90 and 15,105.88 is: 20,845.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,681.40 : 38,199.90 = 15,105.88 : x
  2. Step 2: Convert to fraction form
    27,681.40/38,199.90 = 15,105.88/x
  3. Step 3: Cross multiply
    27,681.40x = 38,199.90 × 15,105.88
  4. Step 4: Simplify right side
    27,681.40x = 577,043,105.41
  5. Step 5: Solve for x
    x = 577,043,105.41/27,681.40
  6. Step 6: Final answer
    x = 20,845.88

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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.