Home / 15,445.89-21,315.35-8,372.33

Finding the Fourth Proportional to 15,445.89, 21,315.35 and 8,372.33

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Solution

The fourth proportional to 15,445.89, 21,315.35 and 8,372.33 is: 11,553.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.89 : 21,315.35 = 8,372.33 : x
  2. Step 2: Convert to fraction form
    15,445.89/21,315.35 = 8,372.33/x
  3. Step 3: Cross multiply
    15,445.89x = 21,315.35 × 8,372.33
  4. Step 4: Simplify right side
    15,445.89x = 178,459,138.55
  5. Step 5: Solve for x
    x = 178,459,138.55/15,445.89
  6. Step 6: Final answer
    x = 11,553.83

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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.