Home / 31,991.28-47,985.20-9,804.72

Finding the Fourth Proportional to 31,991.28, 47,985.20 and 9,804.72

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Solution

The fourth proportional to 31,991.28, 47,985.20 and 9,804.72 is: 14,706.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,991.28 : 47,985.20 = 9,804.72 : x
  2. Step 2: Convert to fraction form
    31,991.28/47,985.20 = 9,804.72/x
  3. Step 3: Cross multiply
    31,991.28x = 47,985.20 × 9,804.72
  4. Step 4: Simplify right side
    31,991.28x = 470,481,450.14
  5. Step 5: Solve for x
    x = 470,481,450.14/31,991.28
  6. Step 6: Final answer
    x = 14,706.55

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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.