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Finding the Fourth Proportional to 12,888.84, 17,876.90 and 12,363.96

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Solution

The fourth proportional to 12,888.84, 17,876.90 and 12,363.96 is: 17,148.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.84 : 17,876.90 = 12,363.96 : x
  2. Step 2: Convert to fraction form
    12,888.84/17,876.90 = 12,363.96/x
  3. Step 3: Cross multiply
    12,888.84x = 17,876.90 × 12,363.96
  4. Step 4: Simplify right side
    12,888.84x = 221,029,276.52
  5. Step 5: Solve for x
    x = 221,029,276.52/12,888.84
  6. Step 6: Final answer
    x = 17,148.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.