Home / 5,615.12-8,420.86-2,653.11

Finding the Fourth Proportional to 5,615.12, 8,420.86 and 2,653.11

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Solution

The fourth proportional to 5,615.12, 8,420.86 and 2,653.11 is: 3,978.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,615.12 : 8,420.86 = 2,653.11 : x
  2. Step 2: Convert to fraction form
    5,615.12/8,420.86 = 2,653.11/x
  3. Step 3: Cross multiply
    5,615.12x = 8,420.86 × 2,653.11
  4. Step 4: Simplify right side
    5,615.12x = 22,341,467.87
  5. Step 5: Solve for x
    x = 22,341,467.87/5,615.12
  6. Step 6: Final answer
    x = 3,978.81

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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.