Home / 21,318.27-31,980.32-7,274.52

Finding the Fourth Proportional to 21,318.27, 31,980.32 and 7,274.52

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Solution

The fourth proportional to 21,318.27, 31,980.32 and 7,274.52 is: 10,912.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.27 : 31,980.32 = 7,274.52 : x
  2. Step 2: Convert to fraction form
    21,318.27/31,980.32 = 7,274.52/x
  3. Step 3: Cross multiply
    21,318.27x = 31,980.32 × 7,274.52
  4. Step 4: Simplify right side
    21,318.27x = 232,641,477.45
  5. Step 5: Solve for x
    x = 232,641,477.45/21,318.27
  6. Step 6: Final answer
    x = 10,912.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.