Home / 20,678.09-31,029.89-9,582.71

Finding the Fourth Proportional to 20,678.09, 31,029.89 and 9,582.71

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Solution

The fourth proportional to 20,678.09, 31,029.89 and 9,582.71 is: 14,379.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.09 : 31,029.89 = 9,582.71 : x
  2. Step 2: Convert to fraction form
    20,678.09/31,029.89 = 9,582.71/x
  3. Step 3: Cross multiply
    20,678.09x = 31,029.89 × 9,582.71
  4. Step 4: Simplify right side
    20,678.09x = 297,350,359.63
  5. Step 5: Solve for x
    x = 297,350,359.63/20,678.09
  6. Step 6: Final answer
    x = 14,379.97

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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.