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Finding the Fourth Proportional to 11,308.78, 15,606.12 and 6,340.78

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Solution

The fourth proportional to 11,308.78, 15,606.12 and 6,340.78 is: 8,750.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,308.78 : 15,606.12 = 6,340.78 : x
  2. Step 2: Convert to fraction form
    11,308.78/15,606.12 = 6,340.78/x
  3. Step 3: Cross multiply
    11,308.78x = 15,606.12 × 6,340.78
  4. Step 4: Simplify right side
    11,308.78x = 98,954,973.57
  5. Step 5: Solve for x
    x = 98,954,973.57/11,308.78
  6. Step 6: Final answer
    x = 8,750.28

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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.