Home / 18,120.72-25,007.28-10,162.80

Finding the Fourth Proportional to 18,120.72, 25,007.28 and 10,162.80

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Solution

The fourth proportional to 18,120.72, 25,007.28 and 10,162.80 is: 14,025.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.72 : 25,007.28 = 10,162.80 : x
  2. Step 2: Convert to fraction form
    18,120.72/25,007.28 = 10,162.80/x
  3. Step 3: Cross multiply
    18,120.72x = 25,007.28 × 10,162.80
  4. Step 4: Simplify right side
    18,120.72x = 254,143,985.18
  5. Step 5: Solve for x
    x = 254,143,985.18/18,120.72
  6. Step 6: Final answer
    x = 14,025.05

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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.