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Finding the Fourth Proportional to 13,353.79, 19,979.79 and 8,288.77

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Solution

The fourth proportional to 13,353.79, 19,979.79 and 8,288.77 is: 12,401.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,353.79 : 19,979.79 = 8,288.77 : x
  2. Step 2: Convert to fraction form
    13,353.79/19,979.79 = 8,288.77/x
  3. Step 3: Cross multiply
    13,353.79x = 19,979.79 × 8,288.77
  4. Step 4: Simplify right side
    13,353.79x = 165,607,883.96
  5. Step 5: Solve for x
    x = 165,607,883.96/13,353.79
  6. Step 6: Final answer
    x = 12,401.56

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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.