Home / 21,287.43-29,377.56-11,855.99

Finding the Fourth Proportional to 21,287.43, 29,377.56 and 11,855.99

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Solution

The fourth proportional to 21,287.43, 29,377.56 and 11,855.99 is: 16,361.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.43 : 29,377.56 = 11,855.99 : x
  2. Step 2: Convert to fraction form
    21,287.43/29,377.56 = 11,855.99/x
  3. Step 3: Cross multiply
    21,287.43x = 29,377.56 × 11,855.99
  4. Step 4: Simplify right side
    21,287.43x = 348,299,851.42
  5. Step 5: Solve for x
    x = 348,299,851.42/21,287.43
  6. Step 6: Final answer
    x = 16,361.77

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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.