Home / 15,513.15-21,408.60-8,440.05

Finding the Fourth Proportional to 15,513.15, 21,408.60 and 8,440.05

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Solution

The fourth proportional to 15,513.15, 21,408.60 and 8,440.05 is: 11,647.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.15 : 21,408.60 = 8,440.05 : x
  2. Step 2: Convert to fraction form
    15,513.15/21,408.60 = 8,440.05/x
  3. Step 3: Cross multiply
    15,513.15x = 21,408.60 × 8,440.05
  4. Step 4: Simplify right side
    15,513.15x = 180,689,654.43
  5. Step 5: Solve for x
    x = 180,689,654.43/15,513.15
  6. Step 6: Final answer
    x = 11,647.52

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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.