Home / 28,439.39-42,624.50-20,121.81

Finding the Fourth Proportional to 28,439.39, 42,624.50 and 20,121.81

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Solution

The fourth proportional to 28,439.39, 42,624.50 and 20,121.81 is: 30,158.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.39 : 42,624.50 = 20,121.81 : x
  2. Step 2: Convert to fraction form
    28,439.39/42,624.50 = 20,121.81/x
  3. Step 3: Cross multiply
    28,439.39x = 42,624.50 × 20,121.81
  4. Step 4: Simplify right side
    28,439.39x = 857,682,140.65
  5. Step 5: Solve for x
    x = 857,682,140.65/28,439.39
  6. Step 6: Final answer
    x = 30,158.24

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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.