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Finding the Fourth Proportional to 11,203.76, 15,460.08 and 6,489.60

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Solution

The fourth proportional to 11,203.76, 15,460.08 and 6,489.60 is: 8,955.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,203.76 : 15,460.08 = 6,489.60 : x
  2. Step 2: Convert to fraction form
    11,203.76/15,460.08 = 6,489.60/x
  3. Step 3: Cross multiply
    11,203.76x = 15,460.08 × 6,489.60
  4. Step 4: Simplify right side
    11,203.76x = 100,329,735.17
  5. Step 5: Solve for x
    x = 100,329,735.17/11,203.76
  6. Step 6: Final answer
    x = 8,955.01

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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.