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Finding the Fourth Proportional to 30,099.86, 45,149.89 and 7,911.36

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Solution

The fourth proportional to 30,099.86, 45,149.89 and 7,911.36 is: 11,867.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,099.86 : 45,149.89 = 7,911.36 : x
  2. Step 2: Convert to fraction form
    30,099.86/45,149.89 = 7,911.36/x
  3. Step 3: Cross multiply
    30,099.86x = 45,149.89 × 7,911.36
  4. Step 4: Simplify right side
    30,099.86x = 357,197,033.75
  5. Step 5: Solve for x
    x = 357,197,033.75/30,099.86
  6. Step 6: Final answer
    x = 11,867.07

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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.