Home / 21,318.74-29,415.39-11,887.10

Finding the Fourth Proportional to 21,318.74, 29,415.39 and 11,887.10

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Solution

The fourth proportional to 21,318.74, 29,415.39 and 11,887.10 is: 16,401.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.74 : 29,415.39 = 11,887.10 : x
  2. Step 2: Convert to fraction form
    21,318.74/29,415.39 = 11,887.10/x
  3. Step 3: Cross multiply
    21,318.74x = 29,415.39 × 11,887.10
  4. Step 4: Simplify right side
    21,318.74x = 349,663,682.47
  5. Step 5: Solve for x
    x = 349,663,682.47/21,318.74
  6. Step 6: Final answer
    x = 16,401.70

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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.