Home / 31,780.12-47,669.82-7,764.63

Finding the Fourth Proportional to 31,780.12, 47,669.82 and 7,764.63

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Solution

The fourth proportional to 31,780.12, 47,669.82 and 7,764.63 is: 11,646.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,780.12 : 47,669.82 = 7,764.63 : x
  2. Step 2: Convert to fraction form
    31,780.12/47,669.82 = 7,764.63/x
  3. Step 3: Cross multiply
    31,780.12x = 47,669.82 × 7,764.63
  4. Step 4: Simplify right side
    31,780.12x = 370,138,514.47
  5. Step 5: Solve for x
    x = 370,138,514.47/31,780.12
  6. Step 6: Final answer
    x = 11,646.86

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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.