Home / 12,611.16-17,408.15-9,915.36

Finding the Fourth Proportional to 12,611.16, 17,408.15 and 9,915.36

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Solution

The fourth proportional to 12,611.16, 17,408.15 and 9,915.36 is: 13,686.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.16 : 17,408.15 = 9,915.36 : x
  2. Step 2: Convert to fraction form
    12,611.16/17,408.15 = 9,915.36/x
  3. Step 3: Cross multiply
    12,611.16x = 17,408.15 × 9,915.36
  4. Step 4: Simplify right side
    12,611.16x = 172,608,024.61
  5. Step 5: Solve for x
    x = 172,608,024.61/12,611.16
  6. Step 6: Final answer
    x = 13,686.93

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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.