Home / 18,678.87-28,021.02-5,529.51

Finding the Fourth Proportional to 18,678.87, 28,021.02 and 5,529.51

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Solution

The fourth proportional to 18,678.87, 28,021.02 and 5,529.51 is: 8,295.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.87 : 28,021.02 = 5,529.51 : x
  2. Step 2: Convert to fraction form
    18,678.87/28,021.02 = 5,529.51/x
  3. Step 3: Cross multiply
    18,678.87x = 28,021.02 × 5,529.51
  4. Step 4: Simplify right side
    18,678.87x = 154,942,510.30
  5. Step 5: Solve for x
    x = 154,942,510.30/18,678.87
  6. Step 6: Final answer
    x = 8,295.07

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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.