Home / 21,318.48-31,981.67-7,277.74

Finding the Fourth Proportional to 21,318.48, 31,981.67 and 7,277.74

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Solution

The fourth proportional to 21,318.48, 31,981.67 and 7,277.74 is: 10,917.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.48 : 31,981.67 = 7,277.74 : x
  2. Step 2: Convert to fraction form
    21,318.48/31,981.67 = 7,277.74/x
  3. Step 3: Cross multiply
    21,318.48x = 31,981.67 × 7,277.74
  4. Step 4: Simplify right side
    21,318.48x = 232,754,189.97
  5. Step 5: Solve for x
    x = 232,754,189.97/21,318.48
  6. Step 6: Final answer
    x = 10,917.95

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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.