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Finding the Fourth Proportional to 18,390.33, 25,356.24 and 15,552.63

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Solution

The fourth proportional to 18,390.33, 25,356.24 and 15,552.63 is: 21,443.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.33 : 25,356.24 = 15,552.63 : x
  2. Step 2: Convert to fraction form
    18,390.33/25,356.24 = 15,552.63/x
  3. Step 3: Cross multiply
    18,390.33x = 25,356.24 × 15,552.63
  4. Step 4: Simplify right side
    18,390.33x = 394,356,218.91
  5. Step 5: Solve for x
    x = 394,356,218.91/18,390.33
  6. Step 6: Final answer
    x = 21,443.67

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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.