Home / 21,408.76-29,544.30-12,911.32

Finding the Fourth Proportional to 21,408.76, 29,544.30 and 12,911.32

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Solution

The fourth proportional to 21,408.76, 29,544.30 and 12,911.32 is: 17,817.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.76 : 29,544.30 = 12,911.32 : x
  2. Step 2: Convert to fraction form
    21,408.76/29,544.30 = 12,911.32/x
  3. Step 3: Cross multiply
    21,408.76x = 29,544.30 × 12,911.32
  4. Step 4: Simplify right side
    21,408.76x = 381,455,911.48
  5. Step 5: Solve for x
    x = 381,455,911.48/21,408.76
  6. Step 6: Final answer
    x = 17,817.75

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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.