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Finding the Fourth Proportional to 18,325.65, 25,289.35 and 9,942.15

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Solution

The fourth proportional to 18,325.65, 25,289.35 and 9,942.15 is: 13,720.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,325.65 : 25,289.35 = 9,942.15 : x
  2. Step 2: Convert to fraction form
    18,325.65/25,289.35 = 9,942.15/x
  3. Step 3: Cross multiply
    18,325.65x = 25,289.35 × 9,942.15
  4. Step 4: Simplify right side
    18,325.65x = 251,430,511.10
  5. Step 5: Solve for x
    x = 251,430,511.10/18,325.65
  6. Step 6: Final answer
    x = 13,720.14

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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.