Home / 27,855.64-38,440.72-15,280.36

Finding the Fourth Proportional to 27,855.64, 38,440.72 and 15,280.36

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Solution

The fourth proportional to 27,855.64, 38,440.72 and 15,280.36 is: 21,086.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,855.64 : 38,440.72 = 15,280.36 : x
  2. Step 2: Convert to fraction form
    27,855.64/38,440.72 = 15,280.36/x
  3. Step 3: Cross multiply
    27,855.64x = 38,440.72 × 15,280.36
  4. Step 4: Simplify right side
    27,855.64x = 587,388,040.26
  5. Step 5: Solve for x
    x = 587,388,040.26/27,855.64
  6. Step 6: Final answer
    x = 21,086.86

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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.