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Finding the Fourth Proportional to 9,998.12, 14,980.78 and 3,420.76

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Solution

The fourth proportional to 9,998.12, 14,980.78 and 3,420.76 is: 5,125.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,998.12 : 14,980.78 = 3,420.76 : x
  2. Step 2: Convert to fraction form
    9,998.12/14,980.78 = 3,420.76/x
  3. Step 3: Cross multiply
    9,998.12x = 14,980.78 × 3,420.76
  4. Step 4: Simplify right side
    9,998.12x = 51,245,652.99
  5. Step 5: Solve for x
    x = 51,245,652.99/9,998.12
  6. Step 6: Final answer
    x = 5,125.53

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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.