Home / 9,885.20-13,641.45-5,408.90

Finding the Fourth Proportional to 9,885.20, 13,641.45 and 5,408.90

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Solution

The fourth proportional to 9,885.20, 13,641.45 and 5,408.90 is: 7,464.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,885.20 : 13,641.45 = 5,408.90 : x
  2. Step 2: Convert to fraction form
    9,885.20/13,641.45 = 5,408.90/x
  3. Step 3: Cross multiply
    9,885.20x = 13,641.45 × 5,408.90
  4. Step 4: Simplify right side
    9,885.20x = 73,785,238.91
  5. Step 5: Solve for x
    x = 73,785,238.91/9,885.20
  6. Step 6: Final answer
    x = 7,464.21

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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.