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Finding the Fourth Proportional to 13,228.76, 18,255.08 and 7,260.30

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Solution

The fourth proportional to 13,228.76, 18,255.08 and 7,260.30 is: 10,018.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,228.76 : 18,255.08 = 7,260.30 : x
  2. Step 2: Convert to fraction form
    13,228.76/18,255.08 = 7,260.30/x
  3. Step 3: Cross multiply
    13,228.76x = 18,255.08 × 7,260.30
  4. Step 4: Simplify right side
    13,228.76x = 132,537,321.02
  5. Step 5: Solve for x
    x = 132,537,321.02/13,228.76
  6. Step 6: Final answer
    x = 10,018.88

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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.