Home / 20,019.25-30,039.59-12,997.61

Finding the Fourth Proportional to 20,019.25, 30,039.59 and 12,997.61

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Solution

The fourth proportional to 20,019.25, 30,039.59 and 12,997.61 is: 19,503.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,019.25 : 30,039.59 = 12,997.61 : x
  2. Step 2: Convert to fraction form
    20,019.25/30,039.59 = 12,997.61/x
  3. Step 3: Cross multiply
    20,019.25x = 30,039.59 × 12,997.61
  4. Step 4: Simplify right side
    20,019.25x = 390,442,875.38
  5. Step 5: Solve for x
    x = 390,442,875.38/20,019.25
  6. Step 6: Final answer
    x = 19,503.37

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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.