Home / 13,720.64-20,578.08-4,484.48

Finding the Fourth Proportional to 13,720.64, 20,578.08 and 4,484.48

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Solution

The fourth proportional to 13,720.64, 20,578.08 and 4,484.48 is: 6,725.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.64 : 20,578.08 = 4,484.48 : x
  2. Step 2: Convert to fraction form
    13,720.64/20,578.08 = 4,484.48/x
  3. Step 3: Cross multiply
    13,720.64x = 20,578.08 × 4,484.48
  4. Step 4: Simplify right side
    13,720.64x = 92,281,988.20
  5. Step 5: Solve for x
    x = 92,281,988.20/13,720.64
  6. Step 6: Final answer
    x = 6,725.78

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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.