Home / 21,319.84-29,422-11,890.24

Finding the Fourth Proportional to 21,319.84, 29,422 and 11,890.24

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Solution

The fourth proportional to 21,319.84, 29,422 and 11,890.24 is: 16,408.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.84 : 29,422 = 11,890.24 : x
  2. Step 2: Convert to fraction form
    21,319.84/29,422 = 11,890.24/x
  3. Step 3: Cross multiply
    21,319.84x = 29,422 × 11,890.24
  4. Step 4: Simplify right side
    21,319.84x = 349,834,641.28
  5. Step 5: Solve for x
    x = 349,834,641.28/21,319.84
  6. Step 6: Final answer
    x = 16,408.88

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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.