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Finding the Fourth Proportional to 21,651.36, 29,881.80 and 12,702.36

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Solution

The fourth proportional to 21,651.36, 29,881.80 and 12,702.36 is: 17,530.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651.36 : 29,881.80 = 12,702.36 : x
  2. Step 2: Convert to fraction form
    21,651.36/29,881.80 = 12,702.36/x
  3. Step 3: Cross multiply
    21,651.36x = 29,881.80 × 12,702.36
  4. Step 4: Simplify right side
    21,651.36x = 379,569,381.05
  5. Step 5: Solve for x
    x = 379,569,381.05/21,651.36
  6. Step 6: Final answer
    x = 17,530.97

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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.