Home / 28,861.18-43,305.46-19,990.15

Finding the Fourth Proportional to 28,861.18, 43,305.46 and 19,990.15

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Solution

The fourth proportional to 28,861.18, 43,305.46 and 19,990.15 is: 29,994.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,861.18 : 43,305.46 = 19,990.15 : x
  2. Step 2: Convert to fraction form
    28,861.18/43,305.46 = 19,990.15/x
  3. Step 3: Cross multiply
    28,861.18x = 43,305.46 × 19,990.15
  4. Step 4: Simplify right side
    28,861.18x = 865,682,424.69
  5. Step 5: Solve for x
    x = 865,682,424.69/28,861.18
  6. Step 6: Final answer
    x = 29,994.70

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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.