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Finding the Fourth Proportional to 18,398.88, 25,390.62 and 10,015.38

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Solution

The fourth proportional to 18,398.88, 25,390.62 and 10,015.38 is: 13,821.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.88 : 25,390.62 = 10,015.38 : x
  2. Step 2: Convert to fraction form
    18,398.88/25,390.62 = 10,015.38/x
  3. Step 3: Cross multiply
    18,398.88x = 25,390.62 × 10,015.38
  4. Step 4: Simplify right side
    18,398.88x = 254,296,707.74
  5. Step 5: Solve for x
    x = 254,296,707.74/18,398.88
  6. Step 6: Final answer
    x = 13,821.31

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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.