Home / 13,429.68-20,153.16-7,278

Finding the Fourth Proportional to 13,429.68, 20,153.16 and 7,278

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Solution

The fourth proportional to 13,429.68, 20,153.16 and 7,278 is: 10,921.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,429.68 : 20,153.16 = 7,278 : x
  2. Step 2: Convert to fraction form
    13,429.68/20,153.16 = 7,278/x
  3. Step 3: Cross multiply
    13,429.68x = 20,153.16 × 7,278
  4. Step 4: Simplify right side
    13,429.68x = 146,674,698.48
  5. Step 5: Solve for x
    x = 146,674,698.48/13,429.68
  6. Step 6: Final answer
    x = 10,921.68

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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.