Home / 21,137.16-29,170.20-11,705.72

Finding the Fourth Proportional to 21,137.16, 29,170.20 and 11,705.72

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Solution

The fourth proportional to 21,137.16, 29,170.20 and 11,705.72 is: 16,154.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.16 : 29,170.20 = 11,705.72 : x
  2. Step 2: Convert to fraction form
    21,137.16/29,170.20 = 11,705.72/x
  3. Step 3: Cross multiply
    21,137.16x = 29,170.20 × 11,705.72
  4. Step 4: Simplify right side
    21,137.16x = 341,458,047.69
  5. Step 5: Solve for x
    x = 341,458,047.69/21,137.16
  6. Step 6: Final answer
    x = 16,154.40

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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.