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Finding the Fourth Proportional to 8,645.50, 11,931.34 and 4,919.50

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Solution

The fourth proportional to 8,645.50, 11,931.34 and 4,919.50 is: 6,789.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.50 : 11,931.34 = 4,919.50 : x
  2. Step 2: Convert to fraction form
    8,645.50/11,931.34 = 4,919.50/x
  3. Step 3: Cross multiply
    8,645.50x = 11,931.34 × 4,919.50
  4. Step 4: Simplify right side
    8,645.50x = 58,696,227.13
  5. Step 5: Solve for x
    x = 58,696,227.13/8,645.50
  6. Step 6: Final answer
    x = 6,789.22

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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.