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Finding the Fourth Proportional to 21,644.56, 29,885.16 and 14,214.16

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Solution

The fourth proportional to 21,644.56, 29,885.16 and 14,214.16 is: 19,625.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,644.56 : 29,885.16 = 14,214.16 : x
  2. Step 2: Convert to fraction form
    21,644.56/29,885.16 = 14,214.16/x
  3. Step 3: Cross multiply
    21,644.56x = 29,885.16 × 14,214.16
  4. Step 4: Simplify right side
    21,644.56x = 424,792,445.87
  5. Step 5: Solve for x
    x = 424,792,445.87/21,644.56
  6. Step 6: Final answer
    x = 19,625.83

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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.