Home / 31,988.75-47,999.32-21,578.63

Finding the Fourth Proportional to 31,988.75, 47,999.32 and 21,578.63

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Solution

The fourth proportional to 31,988.75, 47,999.32 and 21,578.63 is: 32,378.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,988.75 : 47,999.32 = 21,578.63 : x
  2. Step 2: Convert to fraction form
    31,988.75/47,999.32 = 21,578.63/x
  3. Step 3: Cross multiply
    31,988.75x = 47,999.32 × 21,578.63
  4. Step 4: Simplify right side
    31,988.75x = 1,035,759,272.59
  5. Step 5: Solve for x
    x = 1,035,759,272.59/31,988.75
  6. Step 6: Final answer
    x = 32,378.87

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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.