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Finding the Fourth Proportional to 8,628.18, 11,903.76 and 5,645.76

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Solution

The fourth proportional to 8,628.18, 11,903.76 and 5,645.76 is: 7,789.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.18 : 11,903.76 = 5,645.76 : x
  2. Step 2: Convert to fraction form
    8,628.18/11,903.76 = 5,645.76/x
  3. Step 3: Cross multiply
    8,628.18x = 11,903.76 × 5,645.76
  4. Step 4: Simplify right side
    8,628.18x = 67,205,772.06
  5. Step 5: Solve for x
    x = 67,205,772.06/8,628.18
  6. Step 6: Final answer
    x = 7,789.10

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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.