Home / 8,666.08-12,982.80-4,278.40

Finding the Fourth Proportional to 8,666.08, 12,982.80 and 4,278.40

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Solution

The fourth proportional to 8,666.08, 12,982.80 and 4,278.40 is: 6,409.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.08 : 12,982.80 = 4,278.40 : x
  2. Step 2: Convert to fraction form
    8,666.08/12,982.80 = 4,278.40/x
  3. Step 3: Cross multiply
    8,666.08x = 12,982.80 × 4,278.40
  4. Step 4: Simplify right side
    8,666.08x = 55,545,611.52
  5. Step 5: Solve for x
    x = 55,545,611.52/8,666.08
  6. Step 6: Final answer
    x = 6,409.54

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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.