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Finding the Fourth Proportional to 15,131.63, 20,881.73 and 8,758.22

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Solution

The fourth proportional to 15,131.63, 20,881.73 and 8,758.22 is: 12,086.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,131.63 : 20,881.73 = 8,758.22 : x
  2. Step 2: Convert to fraction form
    15,131.63/20,881.73 = 8,758.22/x
  3. Step 3: Cross multiply
    15,131.63x = 20,881.73 × 8,758.22
  4. Step 4: Simplify right side
    15,131.63x = 182,886,637.12
  5. Step 5: Solve for x
    x = 182,886,637.12/15,131.63
  6. Step 6: Final answer
    x = 12,086.38

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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.