Home / 31,388-47,080.80-12,662.24

Finding the Fourth Proportional to 31,388, 47,080.80 and 12,662.24

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Solution

The fourth proportional to 31,388, 47,080.80 and 12,662.24 is: 18,992.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,388 : 47,080.80 = 12,662.24 : x
  2. Step 2: Convert to fraction form
    31,388/47,080.80 = 12,662.24/x
  3. Step 3: Cross multiply
    31,388x = 47,080.80 × 12,662.24
  4. Step 4: Simplify right side
    31,388x = 596,148,388.99
  5. Step 5: Solve for x
    x = 596,148,388.99/31,388
  6. Step 6: Final answer
    x = 18,992.88

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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.