Home / 21,188.42-29,239.05-11,756.90

Finding the Fourth Proportional to 21,188.42, 29,239.05 and 11,756.90

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Solution

The fourth proportional to 21,188.42, 29,239.05 and 11,756.90 is: 16,223.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.42 : 29,239.05 = 11,756.90 : x
  2. Step 2: Convert to fraction form
    21,188.42/29,239.05 = 11,756.90/x
  3. Step 3: Cross multiply
    21,188.42x = 29,239.05 × 11,756.90
  4. Step 4: Simplify right side
    21,188.42x = 343,760,586.95
  5. Step 5: Solve for x
    x = 343,760,586.95/21,188.42
  6. Step 6: Final answer
    x = 16,223.98

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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.