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Finding the Fourth Proportional to 18,370.56, 25,351.32 and 9,987

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Solution

The fourth proportional to 18,370.56, 25,351.32 and 9,987 is: 13,782.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,370.56 : 25,351.32 = 9,987 : x
  2. Step 2: Convert to fraction form
    18,370.56/25,351.32 = 9,987/x
  3. Step 3: Cross multiply
    18,370.56x = 25,351.32 × 9,987
  4. Step 4: Simplify right side
    18,370.56x = 253,183,632.84
  5. Step 5: Solve for x
    x = 253,183,632.84/18,370.56
  6. Step 6: Final answer
    x = 13,782.03

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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.