Home / 31,905.56-47,865.18-9,720.72

Finding the Fourth Proportional to 31,905.56, 47,865.18 and 9,720.72

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Solution

The fourth proportional to 31,905.56, 47,865.18 and 9,720.72 is: 14,583.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,905.56 : 47,865.18 = 9,720.72 : x
  2. Step 2: Convert to fraction form
    31,905.56/47,865.18 = 9,720.72/x
  3. Step 3: Cross multiply
    31,905.56x = 47,865.18 × 9,720.72
  4. Step 4: Simplify right side
    31,905.56x = 465,284,083.59
  5. Step 5: Solve for x
    x = 465,284,083.59/31,905.56
  6. Step 6: Final answer
    x = 14,583.17

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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.