Home / 27,987.78-38,621.90-15,240.98

Finding the Fourth Proportional to 27,987.78, 38,621.90 and 15,240.98

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Solution

The fourth proportional to 27,987.78, 38,621.90 and 15,240.98 is: 21,031.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,987.78 : 38,621.90 = 15,240.98 : x
  2. Step 2: Convert to fraction form
    27,987.78/38,621.90 = 15,240.98/x
  3. Step 3: Cross multiply
    27,987.78x = 38,621.90 × 15,240.98
  4. Step 4: Simplify right side
    27,987.78x = 588,635,605.46
  5. Step 5: Solve for x
    x = 588,635,605.46/27,987.78
  6. Step 6: Final answer
    x = 21,031.88

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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.