Home / 21,638.10-29,855.88-14,083.64

Finding the Fourth Proportional to 21,638.10, 29,855.88 and 14,083.64

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Solution

The fourth proportional to 21,638.10, 29,855.88 and 14,083.64 is: 19,432.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,638.10 : 29,855.88 = 14,083.64 : x
  2. Step 2: Convert to fraction form
    21,638.10/29,855.88 = 14,083.64/x
  3. Step 3: Cross multiply
    21,638.10x = 29,855.88 × 14,083.64
  4. Step 4: Simplify right side
    21,638.10x = 420,479,465.80
  5. Step 5: Solve for x
    x = 420,479,465.80/21,638.10
  6. Step 6: Final answer
    x = 19,432.37

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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.