Home / 21,639.72-29,862.90-12,210.12

Finding the Fourth Proportional to 21,639.72, 29,862.90 and 12,210.12

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Solution

The fourth proportional to 21,639.72, 29,862.90 and 12,210.12 is: 16,850.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.72 : 29,862.90 = 12,210.12 : x
  2. Step 2: Convert to fraction form
    21,639.72/29,862.90 = 12,210.12/x
  3. Step 3: Cross multiply
    21,639.72x = 29,862.90 × 12,210.12
  4. Step 4: Simplify right side
    21,639.72x = 364,629,592.55
  5. Step 5: Solve for x
    x = 364,629,592.55/21,639.72
  6. Step 6: Final answer
    x = 16,850.01

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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.