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Finding the Fourth Proportional to 12,308.67, 16,989.08 and 8,437.68

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Solution

The fourth proportional to 12,308.67, 16,989.08 and 8,437.68 is: 11,646.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,308.67 : 16,989.08 = 8,437.68 : x
  2. Step 2: Convert to fraction form
    12,308.67/16,989.08 = 8,437.68/x
  3. Step 3: Cross multiply
    12,308.67x = 16,989.08 × 8,437.68
  4. Step 4: Simplify right side
    12,308.67x = 143,348,378.35
  5. Step 5: Solve for x
    x = 143,348,378.35/12,308.67
  6. Step 6: Final answer
    x = 11,646.13

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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.