Home / 21,321.11-29,417.22-13,767.76

Finding the Fourth Proportional to 21,321.11, 29,417.22 and 13,767.76

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Solution

The fourth proportional to 21,321.11, 29,417.22 and 13,767.76 is: 18,995.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.11 : 29,417.22 = 13,767.76 : x
  2. Step 2: Convert to fraction form
    21,321.11/29,417.22 = 13,767.76/x
  3. Step 3: Cross multiply
    21,321.11x = 29,417.22 × 13,767.76
  4. Step 4: Simplify right side
    21,321.11x = 405,009,151.28
  5. Step 5: Solve for x
    x = 405,009,151.28/21,321.11
  6. Step 6: Final answer
    x = 18,995.69

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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.