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Finding the Fourth Proportional to 27,658.86, 38,187.72 and 21,274.08

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Solution

The fourth proportional to 27,658.86, 38,187.72 and 21,274.08 is: 29,372.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,658.86 : 38,187.72 = 21,274.08 : x
  2. Step 2: Convert to fraction form
    27,658.86/38,187.72 = 21,274.08/x
  3. Step 3: Cross multiply
    27,658.86x = 38,187.72 × 21,274.08
  4. Step 4: Simplify right side
    27,658.86x = 812,408,610.30
  5. Step 5: Solve for x
    x = 812,408,610.30/27,658.86
  6. Step 6: Final answer
    x = 29,372.45

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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.