Home / 27,996.85-38,635.65-15,421.60

Finding the Fourth Proportional to 27,996.85, 38,635.65 and 15,421.60

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Solution

The fourth proportional to 27,996.85, 38,635.65 and 15,421.60 is: 21,281.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,996.85 : 38,635.65 = 15,421.60 : x
  2. Step 2: Convert to fraction form
    27,996.85/38,635.65 = 15,421.60/x
  3. Step 3: Cross multiply
    27,996.85x = 38,635.65 × 15,421.60
  4. Step 4: Simplify right side
    27,996.85x = 595,823,540.04
  5. Step 5: Solve for x
    x = 595,823,540.04/27,996.85
  6. Step 6: Final answer
    x = 21,281.81

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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.