Home / 28,439.24-42,667.05-8,720.70

Finding the Fourth Proportional to 28,439.24, 42,667.05 and 8,720.70

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Solution

The fourth proportional to 28,439.24, 42,667.05 and 8,720.70 is: 13,083.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.24 : 42,667.05 = 8,720.70 : x
  2. Step 2: Convert to fraction form
    28,439.24/42,667.05 = 8,720.70/x
  3. Step 3: Cross multiply
    28,439.24x = 42,667.05 × 8,720.70
  4. Step 4: Simplify right side
    28,439.24x = 372,086,415.64
  5. Step 5: Solve for x
    x = 372,086,415.64/28,439.24
  6. Step 6: Final answer
    x = 13,083.56

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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.