Home / 27,987.40-38,622.60-15,412

Finding the Fourth Proportional to 27,987.40, 38,622.60 and 15,412

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Solution

The fourth proportional to 27,987.40, 38,622.60 and 15,412 is: 21,268.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,987.40 : 38,622.60 = 15,412 : x
  2. Step 2: Convert to fraction form
    27,987.40/38,622.60 = 15,412/x
  3. Step 3: Cross multiply
    27,987.40x = 38,622.60 × 15,412
  4. Step 4: Simplify right side
    27,987.40x = 595,251,511.20
  5. Step 5: Solve for x
    x = 595,251,511.20/27,987.40
  6. Step 6: Final answer
    x = 21,268.55

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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.