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Finding the Fourth Proportional to 18,243.90, 25,176.62 and 9,860.40

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Solution

The fourth proportional to 18,243.90, 25,176.62 and 9,860.40 is: 13,607.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,243.90 : 25,176.62 = 9,860.40 : x
  2. Step 2: Convert to fraction form
    18,243.90/25,176.62 = 9,860.40/x
  3. Step 3: Cross multiply
    18,243.90x = 25,176.62 × 9,860.40
  4. Step 4: Simplify right side
    18,243.90x = 248,251,494.55
  5. Step 5: Solve for x
    x = 248,251,494.55/18,243.90
  6. Step 6: Final answer
    x = 13,607.37

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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.