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Finding the Fourth Proportional to 8,605.47, 11,875.08 and 5,418.12

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Solution

The fourth proportional to 8,605.47, 11,875.08 and 5,418.12 is: 7,476.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.47 : 11,875.08 = 5,418.12 : x
  2. Step 2: Convert to fraction form
    8,605.47/11,875.08 = 5,418.12/x
  3. Step 3: Cross multiply
    8,605.47x = 11,875.08 × 5,418.12
  4. Step 4: Simplify right side
    8,605.47x = 64,340,608.45
  5. Step 5: Solve for x
    x = 64,340,608.45/8,605.47
  6. Step 6: Final answer
    x = 7,476.71

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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.