Home / 15,512.96-21,408.36-8,438.96

Finding the Fourth Proportional to 15,512.96, 21,408.36 and 8,438.96

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Solution

The fourth proportional to 15,512.96, 21,408.36 and 8,438.96 is: 11,646.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,512.96 : 21,408.36 = 8,438.96 : x
  2. Step 2: Convert to fraction form
    15,512.96/21,408.36 = 8,438.96/x
  3. Step 3: Cross multiply
    15,512.96x = 21,408.36 × 8,438.96
  4. Step 4: Simplify right side
    15,512.96x = 180,664,293.71
  5. Step 5: Solve for x
    x = 180,664,293.71/15,512.96
  6. Step 6: Final answer
    x = 11,646.02

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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.