Home / 31,878.84-47,816.43-12,159.39

Finding the Fourth Proportional to 31,878.84, 47,816.43 and 12,159.39

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Solution

The fourth proportional to 31,878.84, 47,816.43 and 12,159.39 is: 18,238.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,878.84 : 47,816.43 = 12,159.39 : x
  2. Step 2: Convert to fraction form
    31,878.84/47,816.43 = 12,159.39/x
  3. Step 3: Cross multiply
    31,878.84x = 47,816.43 × 12,159.39
  4. Step 4: Simplify right side
    31,878.84x = 581,418,620.78
  5. Step 5: Solve for x
    x = 581,418,620.78/31,878.84
  6. Step 6: Final answer
    x = 18,238.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.