Home / 20,747.81-31,111.97-7,590.98

Finding the Fourth Proportional to 20,747.81, 31,111.97 and 7,590.98

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Solution

The fourth proportional to 20,747.81, 31,111.97 and 7,590.98 is: 11,382.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.81 : 31,111.97 = 7,590.98 : x
  2. Step 2: Convert to fraction form
    20,747.81/31,111.97 = 7,590.98/x
  3. Step 3: Cross multiply
    20,747.81x = 31,111.97 × 7,590.98
  4. Step 4: Simplify right side
    20,747.81x = 236,170,148.52
  5. Step 5: Solve for x
    x = 236,170,148.52/20,747.81
  6. Step 6: Final answer
    x = 11,382.90

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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.