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Finding the Fourth Proportional to 18,358.61, 25,334.87 and 9,975.11

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Solution

The fourth proportional to 18,358.61, 25,334.87 and 9,975.11 is: 13,765.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,358.61 : 25,334.87 = 9,975.11 : x
  2. Step 2: Convert to fraction form
    18,358.61/25,334.87 = 9,975.11/x
  3. Step 3: Cross multiply
    18,358.61x = 25,334.87 × 9,975.11
  4. Step 4: Simplify right side
    18,358.61x = 252,717,938.54
  5. Step 5: Solve for x
    x = 252,717,938.54/18,358.61
  6. Step 6: Final answer
    x = 13,765.64

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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.