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Finding the Fourth Proportional to 21,195.58, 29,255.21 and 12,248.28

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Solution

The fourth proportional to 21,195.58, 29,255.21 and 12,248.28 is: 16,905.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.58 : 29,255.21 = 12,248.28 : x
  2. Step 2: Convert to fraction form
    21,195.58/29,255.21 = 12,248.28/x
  3. Step 3: Cross multiply
    21,195.58x = 29,255.21 × 12,248.28
  4. Step 4: Simplify right side
    21,195.58x = 358,326,003.54
  5. Step 5: Solve for x
    x = 358,326,003.54/21,195.58
  6. Step 6: Final answer
    x = 16,905.69

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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.