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Finding the Fourth Proportional to 22,259.92, 30,720.18 and 12,829.12

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Solution

The fourth proportional to 22,259.92, 30,720.18 and 12,829.12 is: 17,705.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,259.92 : 30,720.18 = 12,829.12 : x
  2. Step 2: Convert to fraction form
    22,259.92/30,720.18 = 12,829.12/x
  3. Step 3: Cross multiply
    22,259.92x = 30,720.18 × 12,829.12
  4. Step 4: Simplify right side
    22,259.92x = 394,112,875.64
  5. Step 5: Solve for x
    x = 394,112,875.64/22,259.92
  6. Step 6: Final answer
    x = 17,705.04

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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.