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Finding the Fourth Proportional to 20,019.88, 30,019.60 and 6,688.07

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Solution

The fourth proportional to 20,019.88, 30,019.60 and 6,688.07 is: 10,028.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,019.88 : 30,019.60 = 6,688.07 : x
  2. Step 2: Convert to fraction form
    20,019.88/30,019.60 = 6,688.07/x
  3. Step 3: Cross multiply
    20,019.88x = 30,019.60 × 6,688.07
  4. Step 4: Simplify right side
    20,019.88x = 200,773,186.17
  5. Step 5: Solve for x
    x = 200,773,186.17/20,019.88
  6. Step 6: Final answer
    x = 10,028.69

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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.