Home / 9,989.11-14,990.35-4,145.72

Finding the Fourth Proportional to 9,989.11, 14,990.35 and 4,145.72

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Solution

The fourth proportional to 9,989.11, 14,990.35 and 4,145.72 is: 6,221.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.11 : 14,990.35 = 4,145.72 : x
  2. Step 2: Convert to fraction form
    9,989.11/14,990.35 = 4,145.72/x
  3. Step 3: Cross multiply
    9,989.11x = 14,990.35 × 4,145.72
  4. Step 4: Simplify right side
    9,989.11x = 62,145,708.49
  5. Step 5: Solve for x
    x = 62,145,708.49/9,989.11
  6. Step 6: Final answer
    x = 6,221.35

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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.