Home / 31,987.88-47,981.81-11,211.38

Finding the Fourth Proportional to 31,987.88, 47,981.81 and 11,211.38

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Solution

The fourth proportional to 31,987.88, 47,981.81 and 11,211.38 is: 16,817.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,987.88 : 47,981.81 = 11,211.38 : x
  2. Step 2: Convert to fraction form
    31,987.88/47,981.81 = 11,211.38/x
  3. Step 3: Cross multiply
    31,987.88x = 47,981.81 × 11,211.38
  4. Step 4: Simplify right side
    31,987.88x = 537,942,305.00
  5. Step 5: Solve for x
    x = 537,942,305.00/31,987.88
  6. Step 6: Final answer
    x = 16,817.07

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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.