Home / 21,171.10-29,219.93-12,217.36

Finding the Fourth Proportional to 21,171.10, 29,219.93 and 12,217.36

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Solution

The fourth proportional to 21,171.10, 29,219.93 and 12,217.36 is: 16,862.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.10 : 29,219.93 = 12,217.36 : x
  2. Step 2: Convert to fraction form
    21,171.10/29,219.93 = 12,217.36/x
  3. Step 3: Cross multiply
    21,171.10x = 29,219.93 × 12,217.36
  4. Step 4: Simplify right side
    21,171.10x = 356,990,403.98
  5. Step 5: Solve for x
    x = 356,990,403.98/21,171.10
  6. Step 6: Final answer
    x = 16,862.16

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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.