Home / 21,408.57-29,543.91-11,977.14

Finding the Fourth Proportional to 21,408.57, 29,543.91 and 11,977.14

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Solution

The fourth proportional to 21,408.57, 29,543.91 and 11,977.14 is: 16,528.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.57 : 29,543.91 = 11,977.14 : x
  2. Step 2: Convert to fraction form
    21,408.57/29,543.91 = 11,977.14/x
  3. Step 3: Cross multiply
    21,408.57x = 29,543.91 × 11,977.14
  4. Step 4: Simplify right side
    21,408.57x = 353,851,546.22
  5. Step 5: Solve for x
    x = 353,851,546.22/21,408.57
  6. Step 6: Final answer
    x = 16,528.50

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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.