Home / 21,110.74-29,133.21-11,680.18

Finding the Fourth Proportional to 21,110.74, 29,133.21 and 11,680.18

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Solution

The fourth proportional to 21,110.74, 29,133.21 and 11,680.18 is: 16,118.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.74 : 29,133.21 = 11,680.18 : x
  2. Step 2: Convert to fraction form
    21,110.74/29,133.21 = 11,680.18/x
  3. Step 3: Cross multiply
    21,110.74x = 29,133.21 × 11,680.18
  4. Step 4: Simplify right side
    21,110.74x = 340,281,136.78
  5. Step 5: Solve for x
    x = 340,281,136.78/21,110.74
  6. Step 6: Final answer
    x = 16,118.86

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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.