Home / 31,384.80-47,110.32-18,935.20

Finding the Fourth Proportional to 31,384.80, 47,110.32 and 18,935.20

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Solution

The fourth proportional to 31,384.80, 47,110.32 and 18,935.20 is: 28,422.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,384.80 : 47,110.32 = 18,935.20 : x
  2. Step 2: Convert to fraction form
    31,384.80/47,110.32 = 18,935.20/x
  3. Step 3: Cross multiply
    31,384.80x = 47,110.32 × 18,935.20
  4. Step 4: Simplify right side
    31,384.80x = 892,043,331.26
  5. Step 5: Solve for x
    x = 892,043,331.26/31,384.80
  6. Step 6: Final answer
    x = 28,422.78

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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.