Home / 21,115.24-29,139.42-11,684.68

Finding the Fourth Proportional to 21,115.24, 29,139.42 and 11,684.68

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Solution

The fourth proportional to 21,115.24, 29,139.42 and 11,684.68 is: 16,125.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.24 : 29,139.42 = 11,684.68 : x
  2. Step 2: Convert to fraction form
    21,115.24/29,139.42 = 11,684.68/x
  3. Step 3: Cross multiply
    21,115.24x = 29,139.42 × 11,684.68
  4. Step 4: Simplify right side
    21,115.24x = 340,484,798.09
  5. Step 5: Solve for x
    x = 340,484,798.09/21,115.24
  6. Step 6: Final answer
    x = 16,125.07

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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.