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Finding the Fourth Proportional to 10,968.58, 15,138.48 and 8,628.58

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Solution

The fourth proportional to 10,968.58, 15,138.48 and 8,628.58 is: 11,908.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,968.58 : 15,138.48 = 8,628.58 : x
  2. Step 2: Convert to fraction form
    10,968.58/15,138.48 = 8,628.58/x
  3. Step 3: Cross multiply
    10,968.58x = 15,138.48 × 8,628.58
  4. Step 4: Simplify right side
    10,968.58x = 130,623,585.76
  5. Step 5: Solve for x
    x = 130,623,585.76/10,968.58
  6. Step 6: Final answer
    x = 11,908.89

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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.