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Finding the Fourth Proportional to 8,447.48, 12,666.78 and 4,938.68

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Solution

The fourth proportional to 8,447.48, 12,666.78 and 4,938.68 is: 7,405.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,447.48 : 12,666.78 = 4,938.68 : x
  2. Step 2: Convert to fraction form
    8,447.48/12,666.78 = 4,938.68/x
  3. Step 3: Cross multiply
    8,447.48x = 12,666.78 × 4,938.68
  4. Step 4: Simplify right side
    8,447.48x = 62,557,173.05
  5. Step 5: Solve for x
    x = 62,557,173.05/8,447.48
  6. Step 6: Final answer
    x = 7,405.42

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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.