Home / 13,869.30-20,804.04-5,320.56

Finding the Fourth Proportional to 13,869.30, 20,804.04 and 5,320.56

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Solution

The fourth proportional to 13,869.30, 20,804.04 and 5,320.56 is: 7,980.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.30 : 20,804.04 = 5,320.56 : x
  2. Step 2: Convert to fraction form
    13,869.30/20,804.04 = 5,320.56/x
  3. Step 3: Cross multiply
    13,869.30x = 20,804.04 × 5,320.56
  4. Step 4: Simplify right side
    13,869.30x = 110,689,143.06
  5. Step 5: Solve for x
    x = 110,689,143.06/13,869.30
  6. Step 6: Final answer
    x = 7,980.87

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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.