Home / 31,985.92-47,981.76-8,611.84

Finding the Fourth Proportional to 31,985.92, 47,981.76 and 8,611.84

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Solution

The fourth proportional to 31,985.92, 47,981.76 and 8,611.84 is: 12,918.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,985.92 : 47,981.76 = 8,611.84 : x
  2. Step 2: Convert to fraction form
    31,985.92/47,981.76 = 8,611.84/x
  3. Step 3: Cross multiply
    31,985.92x = 47,981.76 × 8,611.84
  4. Step 4: Simplify right side
    31,985.92x = 413,211,240.04
  5. Step 5: Solve for x
    x = 413,211,240.04/31,985.92
  6. Step 6: Final answer
    x = 12,918.54

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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.