Home / 21,095.42-29,112.77-12,144.21

Finding the Fourth Proportional to 21,095.42, 29,112.77 and 12,144.21

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Solution

The fourth proportional to 21,095.42, 29,112.77 and 12,144.21 is: 16,759.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,095.42 : 29,112.77 = 12,144.21 : x
  2. Step 2: Convert to fraction form
    21,095.42/29,112.77 = 12,144.21/x
  3. Step 3: Cross multiply
    21,095.42x = 29,112.77 × 12,144.21
  4. Step 4: Simplify right side
    21,095.42x = 353,551,531.84
  5. Step 5: Solve for x
    x = 353,551,531.84/21,095.42
  6. Step 6: Final answer
    x = 16,759.64

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Double scale
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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.