Home / 21,400.25-29,531.79-11,840.49

Finding the Fourth Proportional to 21,400.25, 29,531.79 and 11,840.49

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Solution

The fourth proportional to 21,400.25, 29,531.79 and 11,840.49 is: 16,339.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,400.25 : 29,531.79 = 11,840.49 : x
  2. Step 2: Convert to fraction form
    21,400.25/29,531.79 = 11,840.49/x
  3. Step 3: Cross multiply
    21,400.25x = 29,531.79 × 11,840.49
  4. Step 4: Simplify right side
    21,400.25x = 349,670,864.18
  5. Step 5: Solve for x
    x = 349,670,864.18/21,400.25
  6. Step 6: Final answer
    x = 16,339.57

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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.