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Finding the Fourth Proportional to 13,612.64, 20,427.24 and 6,220.64

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Solution

The fourth proportional to 13,612.64, 20,427.24 and 6,220.64 is: 9,334.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.64 : 20,427.24 = 6,220.64 : x
  2. Step 2: Convert to fraction form
    13,612.64/20,427.24 = 6,220.64/x
  3. Step 3: Cross multiply
    13,612.64x = 20,427.24 × 6,220.64
  4. Step 4: Simplify right side
    13,612.64x = 127,070,506.23
  5. Step 5: Solve for x
    x = 127,070,506.23/13,612.64
  6. Step 6: Final answer
    x = 9,334.74

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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.