Home / 31,874.12-47,816.88-13,143.76

Finding the Fourth Proportional to 31,874.12, 47,816.88 and 13,143.76

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Solution

The fourth proportional to 31,874.12, 47,816.88 and 13,143.76 is: 19,717.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,874.12 : 47,816.88 = 13,143.76 : x
  2. Step 2: Convert to fraction form
    31,874.12/47,816.88 = 13,143.76/x
  3. Step 3: Cross multiply
    31,874.12x = 47,816.88 × 13,143.76
  4. Step 4: Simplify right side
    31,874.12x = 628,493,594.67
  5. Step 5: Solve for x
    x = 628,493,594.67/31,874.12
  6. Step 6: Final answer
    x = 19,717.99

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1.5x scale

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.