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Finding the Fourth Proportional to 21,071.74, 29,076.52 and 11,639.74

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Solution

The fourth proportional to 21,071.74, 29,076.52 and 11,639.74 is: 16,061.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.74 : 29,076.52 = 11,639.74 : x
  2. Step 2: Convert to fraction form
    21,071.74/29,076.52 = 11,639.74/x
  3. Step 3: Cross multiply
    21,071.74x = 29,076.52 × 11,639.74
  4. Step 4: Simplify right side
    21,071.74x = 338,442,929.32
  5. Step 5: Solve for x
    x = 338,442,929.32/21,071.74
  6. Step 6: Final answer
    x = 16,061.46

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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.