Home / 19,996.40-30,005.40-8,310.80

Finding the Fourth Proportional to 19,996.40, 30,005.40 and 8,310.80

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Solution

The fourth proportional to 19,996.40, 30,005.40 and 8,310.80 is: 12,470.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,996.40 : 30,005.40 = 8,310.80 : x
  2. Step 2: Convert to fraction form
    19,996.40/30,005.40 = 8,310.80/x
  3. Step 3: Cross multiply
    19,996.40x = 30,005.40 × 8,310.80
  4. Step 4: Simplify right side
    19,996.40x = 249,368,878.32
  5. Step 5: Solve for x
    x = 249,368,878.32/19,996.40
  6. Step 6: Final answer
    x = 12,470.69

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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.