Home / 15,100.40-20,837.54-8,385.72

Finding the Fourth Proportional to 15,100.40, 20,837.54 and 8,385.72

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Solution

The fourth proportional to 15,100.40, 20,837.54 and 8,385.72 is: 11,571.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,100.40 : 20,837.54 = 8,385.72 : x
  2. Step 2: Convert to fraction form
    15,100.40/20,837.54 = 8,385.72/x
  3. Step 3: Cross multiply
    15,100.40x = 20,837.54 × 8,385.72
  4. Step 4: Simplify right side
    15,100.40x = 174,737,775.93
  5. Step 5: Solve for x
    x = 174,737,775.93/15,100.40
  6. Step 6: Final answer
    x = 11,571.73

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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.