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Finding the Fourth Proportional to 18,578.52, 25,614.90 and 15,889.32

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Solution

The fourth proportional to 18,578.52, 25,614.90 and 15,889.32 is: 21,907.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,578.52 : 25,614.90 = 15,889.32 : x
  2. Step 2: Convert to fraction form
    18,578.52/25,614.90 = 15,889.32/x
  3. Step 3: Cross multiply
    18,578.52x = 25,614.90 × 15,889.32
  4. Step 4: Simplify right side
    18,578.52x = 407,003,342.87
  5. Step 5: Solve for x
    x = 407,003,342.87/18,578.52
  6. Step 6: Final answer
    x = 21,907.20

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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.