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Finding the Fourth Proportional to 18,358.68, 25,335.32 and 9,975.20

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Solution

The fourth proportional to 18,358.68, 25,335.32 and 9,975.20 is: 13,765.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,358.68 : 25,335.32 = 9,975.20 : x
  2. Step 2: Convert to fraction form
    18,358.68/25,335.32 = 9,975.20/x
  3. Step 3: Cross multiply
    18,358.68x = 25,335.32 × 9,975.20
  4. Step 4: Simplify right side
    18,358.68x = 252,724,884.06
  5. Step 5: Solve for x
    x = 252,724,884.06/18,358.68
  6. Step 6: Final answer
    x = 13,765.96

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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.