Home / 20,979.61-31,476.09-6,188.60

Finding the Fourth Proportional to 20,979.61, 31,476.09 and 6,188.60

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Solution

The fourth proportional to 20,979.61, 31,476.09 and 6,188.60 is: 9,284.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.61 : 31,476.09 = 6,188.60 : x
  2. Step 2: Convert to fraction form
    20,979.61/31,476.09 = 6,188.60/x
  3. Step 3: Cross multiply
    20,979.61x = 31,476.09 × 6,188.60
  4. Step 4: Simplify right side
    20,979.61x = 194,793,032.47
  5. Step 5: Solve for x
    x = 194,793,032.47/20,979.61
  6. Step 6: Final answer
    x = 9,284.87

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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.