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Finding the Fourth Proportional to 13,645.79, 18,819.57 and 8,266.98

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Solution

The fourth proportional to 13,645.79, 18,819.57 and 8,266.98 is: 11,401.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,645.79 : 18,819.57 = 8,266.98 : x
  2. Step 2: Convert to fraction form
    13,645.79/18,819.57 = 8,266.98/x
  3. Step 3: Cross multiply
    13,645.79x = 18,819.57 × 8,266.98
  4. Step 4: Simplify right side
    13,645.79x = 155,581,008.80
  5. Step 5: Solve for x
    x = 155,581,008.80/13,645.79
  6. Step 6: Final answer
    x = 11,401.40

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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.