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Finding the Fourth Proportional to 12,489.58, 17,211.90 and 8,946.64

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Solution

The fourth proportional to 12,489.58, 17,211.90 and 8,946.64 is: 12,329.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.58 : 17,211.90 = 8,946.64 : x
  2. Step 2: Convert to fraction form
    12,489.58/17,211.90 = 8,946.64/x
  3. Step 3: Cross multiply
    12,489.58x = 17,211.90 × 8,946.64
  4. Step 4: Simplify right side
    12,489.58x = 153,988,673.02
  5. Step 5: Solve for x
    x = 153,988,673.02/12,489.58
  6. Step 6: Final answer
    x = 12,329.37

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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.