Home / 21,255.45-31,886.13-9,408.29

Finding the Fourth Proportional to 21,255.45, 31,886.13 and 9,408.29

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Solution

The fourth proportional to 21,255.45, 31,886.13 and 9,408.29 is: 14,113.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.45 : 31,886.13 = 9,408.29 : x
  2. Step 2: Convert to fraction form
    21,255.45/31,886.13 = 9,408.29/x
  3. Step 3: Cross multiply
    21,255.45x = 31,886.13 × 9,408.29
  4. Step 4: Simplify right side
    21,255.45x = 299,993,751.55
  5. Step 5: Solve for x
    x = 299,993,751.55/21,255.45
  6. Step 6: Final answer
    x = 14,113.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.