Home / 21,281.17-29,367.73-11,720.87

Finding the Fourth Proportional to 21,281.17, 29,367.73 and 11,720.87

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Solution

The fourth proportional to 21,281.17, 29,367.73 and 11,720.87 is: 16,174.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.17 : 29,367.73 = 11,720.87 : x
  2. Step 2: Convert to fraction form
    21,281.17/29,367.73 = 11,720.87/x
  3. Step 3: Cross multiply
    21,281.17x = 29,367.73 × 11,720.87
  4. Step 4: Simplify right side
    21,281.17x = 344,215,345.53
  5. Step 5: Solve for x
    x = 344,215,345.53/21,281.17
  6. Step 6: Final answer
    x = 16,174.65

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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.