Home / 31,780.99-47,686.88-13,074.85

Finding the Fourth Proportional to 31,780.99, 47,686.88 and 13,074.85

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Solution

The fourth proportional to 31,780.99, 47,686.88 and 13,074.85 is: 19,618.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,780.99 : 47,686.88 = 13,074.85 : x
  2. Step 2: Convert to fraction form
    31,780.99/47,686.88 = 13,074.85/x
  3. Step 3: Cross multiply
    31,780.99x = 47,686.88 × 13,074.85
  4. Step 4: Simplify right side
    31,780.99x = 623,498,737.59
  5. Step 5: Solve for x
    x = 623,498,737.59/31,780.99
  6. Step 6: Final answer
    x = 19,618.61

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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.