Home / 20,890.41-31,326.39-9,788.13

Finding the Fourth Proportional to 20,890.41, 31,326.39 and 9,788.13

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Solution

The fourth proportional to 20,890.41, 31,326.39 and 9,788.13 is: 14,677.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.41 : 31,326.39 = 9,788.13 : x
  2. Step 2: Convert to fraction form
    20,890.41/31,326.39 = 9,788.13/x
  3. Step 3: Cross multiply
    20,890.41x = 31,326.39 × 9,788.13
  4. Step 4: Simplify right side
    20,890.41x = 306,626,777.75
  5. Step 5: Solve for x
    x = 306,626,777.75/20,890.41
  6. Step 6: Final answer
    x = 14,677.87

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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.