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Finding the Fourth Proportional to 21,516.84, 29,690.10 and 12,084.84

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Solution

The fourth proportional to 21,516.84, 29,690.10 and 12,084.84 is: 16,675.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,516.84 : 29,690.10 = 12,084.84 : x
  2. Step 2: Convert to fraction form
    21,516.84/29,690.10 = 12,084.84/x
  3. Step 3: Cross multiply
    21,516.84x = 29,690.10 × 12,084.84
  4. Step 4: Simplify right side
    21,516.84x = 358,800,108.08
  5. Step 5: Solve for x
    x = 358,800,108.08/21,516.84
  6. Step 6: Final answer
    x = 16,675.32

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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.