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Finding the Fourth Proportional to 8,930.76, 13,386.42 and 7,628.28

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Solution

The fourth proportional to 8,930.76, 13,386.42 and 7,628.28 is: 11,434.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,930.76 : 13,386.42 = 7,628.28 : x
  2. Step 2: Convert to fraction form
    8,930.76/13,386.42 = 7,628.28/x
  3. Step 3: Cross multiply
    8,930.76x = 13,386.42 × 7,628.28
  4. Step 4: Simplify right side
    8,930.76x = 102,115,359.96
  5. Step 5: Solve for x
    x = 102,115,359.96/8,930.76
  6. Step 6: Final answer
    x = 11,434.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.