Home / 18,678.78-28,021.50-6,199.56

Finding the Fourth Proportional to 18,678.78, 28,021.50 and 6,199.56

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Solution

The fourth proportional to 18,678.78, 28,021.50 and 6,199.56 is: 9,300.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.78 : 28,021.50 = 6,199.56 : x
  2. Step 2: Convert to fraction form
    18,678.78/28,021.50 = 6,199.56/x
  3. Step 3: Cross multiply
    18,678.78x = 28,021.50 × 6,199.56
  4. Step 4: Simplify right side
    18,678.78x = 173,720,970.54
  5. Step 5: Solve for x
    x = 173,720,970.54/18,678.78
  6. Step 6: Final answer
    x = 9,300.45

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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.