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Finding the Fourth Proportional to 13,201.56, 18,220.56 and 7,612.56

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Solution

The fourth proportional to 13,201.56, 18,220.56 and 7,612.56 is: 10,506.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,201.56 : 18,220.56 = 7,612.56 : x
  2. Step 2: Convert to fraction form
    13,201.56/18,220.56 = 7,612.56/x
  3. Step 3: Cross multiply
    13,201.56x = 18,220.56 × 7,612.56
  4. Step 4: Simplify right side
    13,201.56x = 138,705,106.23
  5. Step 5: Solve for x
    x = 138,705,106.23/13,201.56
  6. Step 6: Final answer
    x = 10,506.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.