Home / 13,618.62-20,420.55-4,254.57

Finding the Fourth Proportional to 13,618.62, 20,420.55 and 4,254.57

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Solution

The fourth proportional to 13,618.62, 20,420.55 and 4,254.57 is: 6,379.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,618.62 : 20,420.55 = 4,254.57 : x
  2. Step 2: Convert to fraction form
    13,618.62/20,420.55 = 4,254.57/x
  3. Step 3: Cross multiply
    13,618.62x = 20,420.55 × 4,254.57
  4. Step 4: Simplify right side
    13,618.62x = 86,880,659.41
  5. Step 5: Solve for x
    x = 86,880,659.41/13,618.62
  6. Step 6: Final answer
    x = 6,379.55

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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.