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Finding the Fourth Proportional to 22,190, 30,622.20 and 12,254.64

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Solution

The fourth proportional to 22,190, 30,622.20 and 12,254.64 is: 16,911.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,190 : 30,622.20 = 12,254.64 : x
  2. Step 2: Convert to fraction form
    22,190/30,622.20 = 12,254.64/x
  3. Step 3: Cross multiply
    22,190x = 30,622.20 × 12,254.64
  4. Step 4: Simplify right side
    22,190x = 375,264,037.01
  5. Step 5: Solve for x
    x = 375,264,037.01/22,190
  6. Step 6: Final answer
    x = 16,911.40

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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.