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Finding the Fourth Proportional to 16,363.80, 22,555.80 and 12,820.86

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Solution

The fourth proportional to 16,363.80, 22,555.80 and 12,820.86 is: 17,672.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,363.80 : 22,555.80 = 12,820.86 : x
  2. Step 2: Convert to fraction form
    16,363.80/22,555.80 = 12,820.86/x
  3. Step 3: Cross multiply
    16,363.80x = 22,555.80 × 12,820.86
  4. Step 4: Simplify right side
    16,363.80x = 289,184,753.99
  5. Step 5: Solve for x
    x = 289,184,753.99/16,363.80
  6. Step 6: Final answer
    x = 17,672.22

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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.