Home / 8,921.72-13,390.88-4,542.45

Finding the Fourth Proportional to 8,921.72, 13,390.88 and 4,542.45

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Solution

The fourth proportional to 8,921.72, 13,390.88 and 4,542.45 is: 6,817.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.72 : 13,390.88 = 4,542.45 : x
  2. Step 2: Convert to fraction form
    8,921.72/13,390.88 = 4,542.45/x
  3. Step 3: Cross multiply
    8,921.72x = 13,390.88 × 4,542.45
  4. Step 4: Simplify right side
    8,921.72x = 60,827,380.14
  5. Step 5: Solve for x
    x = 60,827,380.14/8,921.72
  6. Step 6: Final answer
    x = 6,817.90

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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.