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Finding the Fourth Proportional to 19,410.98, 26,788.11 and 10,915.78

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Solution

The fourth proportional to 19,410.98, 26,788.11 and 10,915.78 is: 15,064.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,410.98 : 26,788.11 = 10,915.78 : x
  2. Step 2: Convert to fraction form
    19,410.98/26,788.11 = 10,915.78/x
  3. Step 3: Cross multiply
    19,410.98x = 26,788.11 × 10,915.78
  4. Step 4: Simplify right side
    19,410.98x = 292,413,060.80
  5. Step 5: Solve for x
    x = 292,413,060.80/19,410.98
  6. Step 6: Final answer
    x = 15,064.31

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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.