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Finding the Fourth Proportional to 18,585.70, 25,648.13 and 10,087.60

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Solution

The fourth proportional to 18,585.70, 25,648.13 and 10,087.60 is: 13,920.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,585.70 : 25,648.13 = 10,087.60 : x
  2. Step 2: Convert to fraction form
    18,585.70/25,648.13 = 10,087.60/x
  3. Step 3: Cross multiply
    18,585.70x = 25,648.13 × 10,087.60
  4. Step 4: Simplify right side
    18,585.70x = 258,728,076.19
  5. Step 5: Solve for x
    x = 258,728,076.19/18,585.70
  6. Step 6: Final answer
    x = 13,920.81

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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.