Home / 28,190.23-38,902.41-15,443.40

Finding the Fourth Proportional to 28,190.23, 38,902.41 and 15,443.40

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Solution

The fourth proportional to 28,190.23, 38,902.41 and 15,443.40 is: 21,311.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,190.23 : 38,902.41 = 15,443.40 : x
  2. Step 2: Convert to fraction form
    28,190.23/38,902.41 = 15,443.40/x
  3. Step 3: Cross multiply
    28,190.23x = 38,902.41 × 15,443.40
  4. Step 4: Simplify right side
    28,190.23x = 600,785,478.59
  5. Step 5: Solve for x
    x = 600,785,478.59/28,190.23
  6. Step 6: Final answer
    x = 21,311.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.