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Finding the Fourth Proportional to 8,637.66, 11,919.81 and 5,101.20

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Solution

The fourth proportional to 8,637.66, 11,919.81 and 5,101.20 is: 7,039.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,637.66 : 11,919.81 = 5,101.20 : x
  2. Step 2: Convert to fraction form
    8,637.66/11,919.81 = 5,101.20/x
  3. Step 3: Cross multiply
    8,637.66x = 11,919.81 × 5,101.20
  4. Step 4: Simplify right side
    8,637.66x = 60,805,334.77
  5. Step 5: Solve for x
    x = 60,805,334.77/8,637.66
  6. Step 6: Final answer
    x = 7,039.56

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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.