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Finding the Fourth Proportional to 9,897.21, 13,658.09 and 5,918.49

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Solution

The fourth proportional to 9,897.21, 13,658.09 and 5,918.49 is: 8,167.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,897.21 : 13,658.09 = 5,918.49 : x
  2. Step 2: Convert to fraction form
    9,897.21/13,658.09 = 5,918.49/x
  3. Step 3: Cross multiply
    9,897.21x = 13,658.09 × 5,918.49
  4. Step 4: Simplify right side
    9,897.21x = 80,835,239.49
  5. Step 5: Solve for x
    x = 80,835,239.49/9,897.21
  6. Step 6: Final answer
    x = 8,167.48

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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.