Home / 21,880.70-30,192.30-12,318.96

Finding the Fourth Proportional to 21,880.70, 30,192.30 and 12,318.96

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Solution

The fourth proportional to 21,880.70, 30,192.30 and 12,318.96 is: 16,998.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,880.70 : 30,192.30 = 12,318.96 : x
  2. Step 2: Convert to fraction form
    21,880.70/30,192.30 = 12,318.96/x
  3. Step 3: Cross multiply
    21,880.70x = 30,192.30 × 12,318.96
  4. Step 4: Simplify right side
    21,880.70x = 371,937,736.01
  5. Step 5: Solve for x
    x = 371,937,736.01/21,880.70
  6. Step 6: Final answer
    x = 16,998.44

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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.