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Finding the Fourth Proportional to 18,405.87, 25,400.72 and 10,022.67

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Solution

The fourth proportional to 18,405.87, 25,400.72 and 10,022.67 is: 13,831.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405.87 : 25,400.72 = 10,022.67 : x
  2. Step 2: Convert to fraction form
    18,405.87/25,400.72 = 10,022.67/x
  3. Step 3: Cross multiply
    18,405.87x = 25,400.72 × 10,022.67
  4. Step 4: Simplify right side
    18,405.87x = 254,582,984.21
  5. Step 5: Solve for x
    x = 254,582,984.21/18,405.87
  6. Step 6: Final answer
    x = 13,831.62

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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.