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Finding the Fourth Proportional to 21,508.84, 29,679.06 and 12,076.84

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Solution

The fourth proportional to 21,508.84, 29,679.06 and 12,076.84 is: 16,664.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,508.84 : 29,679.06 = 12,076.84 : x
  2. Step 2: Convert to fraction form
    21,508.84/29,679.06 = 12,076.84/x
  3. Step 3: Cross multiply
    21,508.84x = 29,679.06 × 12,076.84
  4. Step 4: Simplify right side
    21,508.84x = 358,429,258.97
  5. Step 5: Solve for x
    x = 358,429,258.97/21,508.84
  6. Step 6: Final answer
    x = 16,664.28

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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.