Home / 27,987.20-38,621.44-15,411.84

Finding the Fourth Proportional to 27,987.20, 38,621.44 and 15,411.84

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Solution

The fourth proportional to 27,987.20, 38,621.44 and 15,411.84 is: 21,267.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,987.20 : 38,621.44 = 15,411.84 : x
  2. Step 2: Convert to fraction form
    27,987.20/38,621.44 = 15,411.84/x
  3. Step 3: Cross multiply
    27,987.20x = 38,621.44 × 15,411.84
  4. Step 4: Simplify right side
    27,987.20x = 595,227,453.85
  5. Step 5: Solve for x
    x = 595,227,453.85/27,987.20
  6. Step 6: Final answer
    x = 21,267.85

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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.