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Finding the Fourth Proportional to 12,571.61, 18,860.63 and 8,881.07

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Solution

The fourth proportional to 12,571.61, 18,860.63 and 8,881.07 is: 13,323.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,571.61 : 18,860.63 = 8,881.07 : x
  2. Step 2: Convert to fraction form
    12,571.61/18,860.63 = 8,881.07/x
  3. Step 3: Cross multiply
    12,571.61x = 18,860.63 × 8,881.07
  4. Step 4: Simplify right side
    12,571.61x = 167,502,436.57
  5. Step 5: Solve for x
    x = 167,502,436.57/12,571.61
  6. Step 6: Final answer
    x = 13,323.87

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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.