Home / 21,310.80-29,408.34-12,235.92

Finding the Fourth Proportional to 21,310.80, 29,408.34 and 12,235.92

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Solution

The fourth proportional to 21,310.80, 29,408.34 and 12,235.92 is: 16,885.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.80 : 29,408.34 = 12,235.92 : x
  2. Step 2: Convert to fraction form
    21,310.80/29,408.34 = 12,235.92/x
  3. Step 3: Cross multiply
    21,310.80x = 29,408.34 × 12,235.92
  4. Step 4: Simplify right side
    21,310.80x = 359,838,095.57
  5. Step 5: Solve for x
    x = 359,838,095.57/21,310.80
  6. Step 6: Final answer
    x = 16,885.25

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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.