Home / 10,209.30-15,309.78-3,186.93

Finding the Fourth Proportional to 10,209.30, 15,309.78 and 3,186.93

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Solution

The fourth proportional to 10,209.30, 15,309.78 and 3,186.93 is: 4,779.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,209.30 : 15,309.78 = 3,186.93 : x
  2. Step 2: Convert to fraction form
    10,209.30/15,309.78 = 3,186.93/x
  3. Step 3: Cross multiply
    10,209.30x = 15,309.78 × 3,186.93
  4. Step 4: Simplify right side
    10,209.30x = 48,791,197.18
  5. Step 5: Solve for x
    x = 48,791,197.18/10,209.30
  6. Step 6: Final answer
    x = 4,779.09

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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.