Home / 10,153.60-15,211.68-8,520.64

Finding the Fourth Proportional to 10,153.60, 15,211.68 and 8,520.64

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Solution

The fourth proportional to 10,153.60, 15,211.68 and 8,520.64 is: 12,765.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,153.60 : 15,211.68 = 8,520.64 : x
  2. Step 2: Convert to fraction form
    10,153.60/15,211.68 = 8,520.64/x
  3. Step 3: Cross multiply
    10,153.60x = 15,211.68 × 8,520.64
  4. Step 4: Simplify right side
    10,153.60x = 129,613,249.08
  5. Step 5: Solve for x
    x = 129,613,249.08/10,153.60
  6. Step 6: Final answer
    x = 12,765.25

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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.