Home / 27,877.88-38,486.40-21,490.52

Finding the Fourth Proportional to 27,877.88, 38,486.40 and 21,490.52

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Solution

The fourth proportional to 27,877.88, 38,486.40 and 21,490.52 is: 29,668.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,877.88 : 38,486.40 = 21,490.52 : x
  2. Step 2: Convert to fraction form
    27,877.88/38,486.40 = 21,490.52/x
  3. Step 3: Cross multiply
    27,877.88x = 38,486.40 × 21,490.52
  4. Step 4: Simplify right side
    27,877.88x = 827,092,748.93
  5. Step 5: Solve for x
    x = 827,092,748.93/27,877.88
  6. Step 6: Final answer
    x = 29,668.42

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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.