Home / 30,989.20-46,487.10-9,921.70

Finding the Fourth Proportional to 30,989.20, 46,487.10 and 9,921.70

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Solution

The fourth proportional to 30,989.20, 46,487.10 and 9,921.70 is: 14,883.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,989.20 : 46,487.10 = 9,921.70 : x
  2. Step 2: Convert to fraction form
    30,989.20/46,487.10 = 9,921.70/x
  3. Step 3: Cross multiply
    30,989.20x = 46,487.10 × 9,921.70
  4. Step 4: Simplify right side
    30,989.20x = 461,231,060.07
  5. Step 5: Solve for x
    x = 461,231,060.07/30,989.20
  6. Step 6: Final answer
    x = 14,883.61

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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.