Home / 15,163.04-20,917-10,439.12

Finding the Fourth Proportional to 15,163.04, 20,917 and 10,439.12

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Solution

The fourth proportional to 15,163.04, 20,917 and 10,439.12 is: 14,400.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,163.04 : 20,917 = 10,439.12 : x
  2. Step 2: Convert to fraction form
    15,163.04/20,917 = 10,439.12/x
  3. Step 3: Cross multiply
    15,163.04x = 20,917 × 10,439.12
  4. Step 4: Simplify right side
    15,163.04x = 218,355,073.04
  5. Step 5: Solve for x
    x = 218,355,073.04/15,163.04
  6. Step 6: Final answer
    x = 14,400.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.