Home / 18,994.83-28,490.09-5,142.75

Finding the Fourth Proportional to 18,994.83, 28,490.09 and 5,142.75

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Solution

The fourth proportional to 18,994.83, 28,490.09 and 5,142.75 is: 7,713.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,994.83 : 28,490.09 = 5,142.75 : x
  2. Step 2: Convert to fraction form
    18,994.83/28,490.09 = 5,142.75/x
  3. Step 3: Cross multiply
    18,994.83x = 28,490.09 × 5,142.75
  4. Step 4: Simplify right side
    18,994.83x = 146,517,384.63
  5. Step 5: Solve for x
    x = 146,517,384.63/18,994.83
  6. Step 6: Final answer
    x = 7,713.54

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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.