Home / 8,538.30-12,811.08-4,155.78

Finding the Fourth Proportional to 8,538.30, 12,811.08 and 4,155.78

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Solution

The fourth proportional to 8,538.30, 12,811.08 and 4,155.78 is: 6,235.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,538.30 : 12,811.08 = 4,155.78 : x
  2. Step 2: Convert to fraction form
    8,538.30/12,811.08 = 4,155.78/x
  3. Step 3: Cross multiply
    8,538.30x = 12,811.08 × 4,155.78
  4. Step 4: Simplify right side
    8,538.30x = 53,240,030.04
  5. Step 5: Solve for x
    x = 53,240,030.04/8,538.30
  6. Step 6: Final answer
    x = 6,235.44

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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.