Home / 27,623.21-38,120.27-15,686.78

Finding the Fourth Proportional to 27,623.21, 38,120.27 and 15,686.78

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Solution

The fourth proportional to 27,623.21, 38,120.27 and 15,686.78 is: 21,647.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,623.21 : 38,120.27 = 15,686.78 : x
  2. Step 2: Convert to fraction form
    27,623.21/38,120.27 = 15,686.78/x
  3. Step 3: Cross multiply
    27,623.21x = 38,120.27 × 15,686.78
  4. Step 4: Simplify right side
    27,623.21x = 597,984,020.00
  5. Step 5: Solve for x
    x = 597,984,020.00/27,623.21
  6. Step 6: Final answer
    x = 21,647.89

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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.