Home / 21,104.40-29,127.66-12,157.08

Finding the Fourth Proportional to 21,104.40, 29,127.66 and 12,157.08

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Solution

The fourth proportional to 21,104.40, 29,127.66 and 12,157.08 is: 16,778.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,104.40 : 29,127.66 = 12,157.08 : x
  2. Step 2: Convert to fraction form
    21,104.40/29,127.66 = 12,157.08/x
  3. Step 3: Cross multiply
    21,104.40x = 29,127.66 × 12,157.08
  4. Step 4: Simplify right side
    21,104.40x = 354,107,292.83
  5. Step 5: Solve for x
    x = 354,107,292.83/21,104.40
  6. Step 6: Final answer
    x = 16,778.84

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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.