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Finding the Fourth Proportional to 8,869, 12,239.20 and 4,890.08

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Solution

The fourth proportional to 8,869, 12,239.20 and 4,890.08 is: 6,748.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,869 : 12,239.20 = 4,890.08 : x
  2. Step 2: Convert to fraction form
    8,869/12,239.20 = 4,890.08/x
  3. Step 3: Cross multiply
    8,869x = 12,239.20 × 4,890.08
  4. Step 4: Simplify right side
    8,869x = 59,850,667.14
  5. Step 5: Solve for x
    x = 59,850,667.14/8,869
  6. Step 6: Final answer
    x = 6,748.30

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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.