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Finding the Fourth Proportional to 15,033.15, 20,742.80 and 8,571.87

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Solution

The fourth proportional to 15,033.15, 20,742.80 and 8,571.87 is: 11,827.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,033.15 : 20,742.80 = 8,571.87 : x
  2. Step 2: Convert to fraction form
    15,033.15/20,742.80 = 8,571.87/x
  3. Step 3: Cross multiply
    15,033.15x = 20,742.80 × 8,571.87
  4. Step 4: Simplify right side
    15,033.15x = 177,804,542.18
  5. Step 5: Solve for x
    x = 177,804,542.18/15,033.15
  6. Step 6: Final answer
    x = 11,827.50

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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.