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Finding the Fourth Proportional to 29,215.84, 40,317.84 and 15,787.09

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Solution

The fourth proportional to 29,215.84, 40,317.84 and 15,787.09 is: 21,786.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,215.84 : 40,317.84 = 15,787.09 : x
  2. Step 2: Convert to fraction form
    29,215.84/40,317.84 = 15,787.09/x
  3. Step 3: Cross multiply
    29,215.84x = 40,317.84 × 15,787.09
  4. Step 4: Simplify right side
    29,215.84x = 636,501,212.62
  5. Step 5: Solve for x
    x = 636,501,212.62/29,215.84
  6. Step 6: Final answer
    x = 21,786.17

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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.