Home / 28,439.44-42,667.36-8,720.90

Finding the Fourth Proportional to 28,439.44, 42,667.36 and 8,720.90

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Solution

The fourth proportional to 28,439.44, 42,667.36 and 8,720.90 is: 13,083.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.44 : 42,667.36 = 8,720.90 : x
  2. Step 2: Convert to fraction form
    28,439.44/42,667.36 = 8,720.90/x
  3. Step 3: Cross multiply
    28,439.44x = 42,667.36 × 8,720.90
  4. Step 4: Simplify right side
    28,439.44x = 372,097,779.82
  5. Step 5: Solve for x
    x = 372,097,779.82/28,439.44
  6. Step 6: Final answer
    x = 13,083.86

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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.