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Finding the Fourth Proportional to 21,053.67, 29,060.16 and 12,447.81

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Solution

The fourth proportional to 21,053.67, 29,060.16 and 12,447.81 is: 17,181.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,053.67 : 29,060.16 = 12,447.81 : x
  2. Step 2: Convert to fraction form
    21,053.67/29,060.16 = 12,447.81/x
  3. Step 3: Cross multiply
    21,053.67x = 29,060.16 × 12,447.81
  4. Step 4: Simplify right side
    21,053.67x = 361,735,350.25
  5. Step 5: Solve for x
    x = 361,735,350.25/21,053.67
  6. Step 6: Final answer
    x = 17,181.58

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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.