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Finding the Fourth Proportional to 12,669.75, 18,987.35 and 6,829.11

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Solution

The fourth proportional to 12,669.75, 18,987.35 and 6,829.11 is: 10,234.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,669.75 : 18,987.35 = 6,829.11 : x
  2. Step 2: Convert to fraction form
    12,669.75/18,987.35 = 6,829.11/x
  3. Step 3: Cross multiply
    12,669.75x = 18,987.35 × 6,829.11
  4. Step 4: Simplify right side
    12,669.75x = 129,666,667.61
  5. Step 5: Solve for x
    x = 129,666,667.61/12,669.75
  6. Step 6: Final answer
    x = 10,234.35

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1.5x scale

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.