Home / 8,102.48-12,148.60-3,421.20

Finding the Fourth Proportional to 8,102.48, 12,148.60 and 3,421.20

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Solution

The fourth proportional to 8,102.48, 12,148.60 and 3,421.20 is: 5,129.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,102.48 : 12,148.60 = 3,421.20 : x
  2. Step 2: Convert to fraction form
    8,102.48/12,148.60 = 3,421.20/x
  3. Step 3: Cross multiply
    8,102.48x = 12,148.60 × 3,421.20
  4. Step 4: Simplify right side
    8,102.48x = 41,562,790.32
  5. Step 5: Solve for x
    x = 41,562,790.32/8,102.48
  6. Step 6: Final answer
    x = 5,129.64

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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.