Home / 21,318.68-29,419.86-11,887.32

Finding the Fourth Proportional to 21,318.68, 29,419.86 and 11,887.32

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Solution

The fourth proportional to 21,318.68, 29,419.86 and 11,887.32 is: 16,404.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.68 : 29,419.86 = 11,887.32 : x
  2. Step 2: Convert to fraction form
    21,318.68/29,419.86 = 11,887.32/x
  3. Step 3: Cross multiply
    21,318.68x = 29,419.86 × 11,887.32
  4. Step 4: Simplify right side
    21,318.68x = 349,723,290.18
  5. Step 5: Solve for x
    x = 349,723,290.18/21,318.68
  6. Step 6: Final answer
    x = 16,404.55

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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.