Home / 8,909.28-13,355.10-4,221

Finding the Fourth Proportional to 8,909.28, 13,355.10 and 4,221

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Solution

The fourth proportional to 8,909.28, 13,355.10 and 4,221 is: 6,327.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.28 : 13,355.10 = 4,221 : x
  2. Step 2: Convert to fraction form
    8,909.28/13,355.10 = 4,221/x
  3. Step 3: Cross multiply
    8,909.28x = 13,355.10 × 4,221
  4. Step 4: Simplify right side
    8,909.28x = 56,371,877.10
  5. Step 5: Solve for x
    x = 56,371,877.10/8,909.28
  6. Step 6: Final answer
    x = 6,327.32

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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.