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Finding the Fourth Proportional to 22,363.50, 30,861.90 and 13,418.76

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Solution

The fourth proportional to 22,363.50, 30,861.90 and 13,418.76 is: 18,518.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,363.50 : 30,861.90 = 13,418.76 : x
  2. Step 2: Convert to fraction form
    22,363.50/30,861.90 = 13,418.76/x
  3. Step 3: Cross multiply
    22,363.50x = 30,861.90 × 13,418.76
  4. Step 4: Simplify right side
    22,363.50x = 414,128,429.24
  5. Step 5: Solve for x
    x = 414,128,429.24/22,363.50
  6. Step 6: Final answer
    x = 18,518.05

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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.