Home / 12,881.79-19,321.20-8,748.36

Finding the Fourth Proportional to 12,881.79, 19,321.20 and 8,748.36

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Solution

The fourth proportional to 12,881.79, 19,321.20 and 8,748.36 is: 13,121.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.79 : 19,321.20 = 8,748.36 : x
  2. Step 2: Convert to fraction form
    12,881.79/19,321.20 = 8,748.36/x
  3. Step 3: Cross multiply
    12,881.79x = 19,321.20 × 8,748.36
  4. Step 4: Simplify right side
    12,881.79x = 169,028,813.23
  5. Step 5: Solve for x
    x = 169,028,813.23/12,881.79
  6. Step 6: Final answer
    x = 13,121.53

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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.