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Finding the Fourth Proportional to 19,479, 26,885.88 and 11,100.36

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Solution

The fourth proportional to 19,479, 26,885.88 and 11,100.36 is: 15,321.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,479 : 26,885.88 = 11,100.36 : x
  2. Step 2: Convert to fraction form
    19,479/26,885.88 = 11,100.36/x
  3. Step 3: Cross multiply
    19,479x = 26,885.88 × 11,100.36
  4. Step 4: Simplify right side
    19,479x = 298,442,946.92
  5. Step 5: Solve for x
    x = 298,442,946.92/19,479
  6. Step 6: Final answer
    x = 15,321.27

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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.