Home / 31,686.05-47,526.60-8,311.88

Finding the Fourth Proportional to 31,686.05, 47,526.60 and 8,311.88

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Solution

The fourth proportional to 31,686.05, 47,526.60 and 8,311.88 is: 12,467.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.05 : 47,526.60 = 8,311.88 : x
  2. Step 2: Convert to fraction form
    31,686.05/47,526.60 = 8,311.88/x
  3. Step 3: Cross multiply
    31,686.05x = 47,526.60 × 8,311.88
  4. Step 4: Simplify right side
    31,686.05x = 395,035,396.01
  5. Step 5: Solve for x
    x = 395,035,396.01/31,686.05
  6. Step 6: Final answer
    x = 12,467.17

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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.