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Finding the Fourth Proportional to 12,679.90, 17,498.01 and 7,897.44

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Solution

The fourth proportional to 12,679.90, 17,498.01 and 7,897.44 is: 10,898.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.90 : 17,498.01 = 7,897.44 : x
  2. Step 2: Convert to fraction form
    12,679.90/17,498.01 = 7,897.44/x
  3. Step 3: Cross multiply
    12,679.90x = 17,498.01 × 7,897.44
  4. Step 4: Simplify right side
    12,679.90x = 138,189,484.09
  5. Step 5: Solve for x
    x = 138,189,484.09/12,679.90
  6. Step 6: Final answer
    x = 10,898.31

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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.