Home / 31,136.82-42,968.22-16,989.66

Finding the Fourth Proportional to 31,136.82, 42,968.22 and 16,989.66

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Solution

The fourth proportional to 31,136.82, 42,968.22 and 16,989.66 is: 23,445.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,136.82 : 42,968.22 = 16,989.66 : x
  2. Step 2: Convert to fraction form
    31,136.82/42,968.22 = 16,989.66/x
  3. Step 3: Cross multiply
    31,136.82x = 42,968.22 × 16,989.66
  4. Step 4: Simplify right side
    31,136.82x = 730,015,448.61
  5. Step 5: Solve for x
    x = 730,015,448.61/31,136.82
  6. Step 6: Final answer
    x = 23,445.41

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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.