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Finding the Fourth Proportional to 12,617.70, 18,918.45 and 5,225.10

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Solution

The fourth proportional to 12,617.70, 18,918.45 and 5,225.10 is: 7,834.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,617.70 : 18,918.45 = 5,225.10 : x
  2. Step 2: Convert to fraction form
    12,617.70/18,918.45 = 5,225.10/x
  3. Step 3: Cross multiply
    12,617.70x = 18,918.45 × 5,225.10
  4. Step 4: Simplify right side
    12,617.70x = 98,850,793.10
  5. Step 5: Solve for x
    x = 98,850,793.10/12,617.70
  6. Step 6: Final answer
    x = 7,834.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.