Home / 18,914.63-28,369.40-7,819.79

Finding the Fourth Proportional to 18,914.63, 28,369.40 and 7,819.79

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Solution

The fourth proportional to 18,914.63, 28,369.40 and 7,819.79 is: 11,728.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,914.63 : 28,369.40 = 7,819.79 : x
  2. Step 2: Convert to fraction form
    18,914.63/28,369.40 = 7,819.79/x
  3. Step 3: Cross multiply
    18,914.63x = 28,369.40 × 7,819.79
  4. Step 4: Simplify right side
    18,914.63x = 221,842,569.48
  5. Step 5: Solve for x
    x = 221,842,569.48/18,914.63
  6. Step 6: Final answer
    x = 11,728.63

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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.