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Finding the Fourth Proportional to 22,420.66, 30,940.72 and 12,349.14

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Solution

The fourth proportional to 22,420.66, 30,940.72 and 12,349.14 is: 17,041.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,420.66 : 30,940.72 = 12,349.14 : x
  2. Step 2: Convert to fraction form
    22,420.66/30,940.72 = 12,349.14/x
  3. Step 3: Cross multiply
    22,420.66x = 30,940.72 × 12,349.14
  4. Step 4: Simplify right side
    22,420.66x = 382,091,089.69
  5. Step 5: Solve for x
    x = 382,091,089.69/22,420.66
  6. Step 6: Final answer
    x = 17,041.92

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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.