Home / 31,379.68-47,084.91-13,828.60

Finding the Fourth Proportional to 31,379.68, 47,084.91 and 13,828.60

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Solution

The fourth proportional to 31,379.68, 47,084.91 and 13,828.60 is: 20,749.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,379.68 : 47,084.91 = 13,828.60 : x
  2. Step 2: Convert to fraction form
    31,379.68/47,084.91 = 13,828.60/x
  3. Step 3: Cross multiply
    31,379.68x = 47,084.91 × 13,828.60
  4. Step 4: Simplify right side
    31,379.68x = 651,118,386.43
  5. Step 5: Solve for x
    x = 651,118,386.43/31,379.68
  6. Step 6: Final answer
    x = 20,749.68

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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.