Home / 12,588.60-18,869.04-5,189

Finding the Fourth Proportional to 12,588.60, 18,869.04 and 5,189

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Solution

The fourth proportional to 12,588.60, 18,869.04 and 5,189 is: 7,777.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,588.60 : 18,869.04 = 5,189 : x
  2. Step 2: Convert to fraction form
    12,588.60/18,869.04 = 5,189/x
  3. Step 3: Cross multiply
    12,588.60x = 18,869.04 × 5,189
  4. Step 4: Simplify right side
    12,588.60x = 97,911,448.56
  5. Step 5: Solve for x
    x = 97,911,448.56/12,588.60
  6. Step 6: Final answer
    x = 7,777.79

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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.