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Finding the Fourth Proportional to 22,457.92, 30,990.24 and 12,520

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Solution

The fourth proportional to 22,457.92, 30,990.24 and 12,520 is: 17,276.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,457.92 : 30,990.24 = 12,520 : x
  2. Step 2: Convert to fraction form
    22,457.92/30,990.24 = 12,520/x
  3. Step 3: Cross multiply
    22,457.92x = 30,990.24 × 12,520
  4. Step 4: Simplify right side
    22,457.92x = 387,997,804.80
  5. Step 5: Solve for x
    x = 387,997,804.80/22,457.92
  6. Step 6: Final answer
    x = 17,276.66

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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.