Home / 31,837.20-47,777.40-20,716.80

Finding the Fourth Proportional to 31,837.20, 47,777.40 and 20,716.80

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Solution

The fourth proportional to 31,837.20, 47,777.40 and 20,716.80 is: 31,089.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,837.20 : 47,777.40 = 20,716.80 : x
  2. Step 2: Convert to fraction form
    31,837.20/47,777.40 = 20,716.80/x
  3. Step 3: Cross multiply
    31,837.20x = 47,777.40 × 20,716.80
  4. Step 4: Simplify right side
    31,837.20x = 989,794,840.32
  5. Step 5: Solve for x
    x = 989,794,840.32/31,837.20
  6. Step 6: Final answer
    x = 31,089.26

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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.