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Finding the Fourth Proportional to 22,420.53, 30,940.53 and 12,349.32

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Solution

The fourth proportional to 22,420.53, 30,940.53 and 12,349.32 is: 17,042.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,420.53 : 30,940.53 = 12,349.32 : x
  2. Step 2: Convert to fraction form
    22,420.53/30,940.53 = 12,349.32/x
  3. Step 3: Cross multiply
    22,420.53x = 30,940.53 × 12,349.32
  4. Step 4: Simplify right side
    22,420.53x = 382,094,505.94
  5. Step 5: Solve for x
    x = 382,094,505.94/22,420.53
  6. Step 6: Final answer
    x = 17,042.17

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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.