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Finding the Fourth Proportional to 39,607.21, 54,658.02 and 21,701.89

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Solution

The fourth proportional to 39,607.21, 54,658.02 and 21,701.89 is: 29,948.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,607.21 : 54,658.02 = 21,701.89 : x
  2. Step 2: Convert to fraction form
    39,607.21/54,658.02 = 21,701.89/x
  3. Step 3: Cross multiply
    39,607.21x = 54,658.02 × 21,701.89
  4. Step 4: Simplify right side
    39,607.21x = 1,186,182,337.66
  5. Step 5: Solve for x
    x = 1,186,182,337.66/39,607.21
  6. Step 6: Final answer
    x = 29,948.65

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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.