Home / 31,515.86-47,273.79-8,142.30

Finding the Fourth Proportional to 31,515.86, 47,273.79 and 8,142.30

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Solution

The fourth proportional to 31,515.86, 47,273.79 and 8,142.30 is: 12,213.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,515.86 : 47,273.79 = 8,142.30 : x
  2. Step 2: Convert to fraction form
    31,515.86/47,273.79 = 8,142.30/x
  3. Step 3: Cross multiply
    31,515.86x = 47,273.79 × 8,142.30
  4. Step 4: Simplify right side
    31,515.86x = 384,917,380.32
  5. Step 5: Solve for x
    x = 384,917,380.32/31,515.86
  6. Step 6: Final answer
    x = 12,213.45

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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.