Home / 13,615.18-20,420.82-4,253.02

Finding the Fourth Proportional to 13,615.18, 20,420.82 and 4,253.02

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Solution

The fourth proportional to 13,615.18, 20,420.82 and 4,253.02 is: 6,378.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.18 : 20,420.82 = 4,253.02 : x
  2. Step 2: Convert to fraction form
    13,615.18/20,420.82 = 4,253.02/x
  3. Step 3: Cross multiply
    13,615.18x = 20,420.82 × 4,253.02
  4. Step 4: Simplify right side
    13,615.18x = 86,850,155.88
  5. Step 5: Solve for x
    x = 86,850,155.88/13,615.18
  6. Step 6: Final answer
    x = 6,378.92

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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.