Home / 21,139.08-29,171.94-11,707.65

Finding the Fourth Proportional to 21,139.08, 29,171.94 and 11,707.65

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Solution

The fourth proportional to 21,139.08, 29,171.94 and 11,707.65 is: 16,156.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.08 : 29,171.94 = 11,707.65 : x
  2. Step 2: Convert to fraction form
    21,139.08/29,171.94 = 11,707.65/x
  3. Step 3: Cross multiply
    21,139.08x = 29,171.94 × 11,707.65
  4. Step 4: Simplify right side
    21,139.08x = 341,534,863.34
  5. Step 5: Solve for x
    x = 341,534,863.34/21,139.08
  6. Step 6: Final answer
    x = 16,156.56

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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.