Home / 21,320.70-31,981.05-11,464.62

Finding the Fourth Proportional to 21,320.70, 31,981.05 and 11,464.62

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Solution

The fourth proportional to 21,320.70, 31,981.05 and 11,464.62 is: 17,196.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.70 : 31,981.05 = 11,464.62 : x
  2. Step 2: Convert to fraction form
    21,320.70/31,981.05 = 11,464.62/x
  3. Step 3: Cross multiply
    21,320.70x = 31,981.05 × 11,464.62
  4. Step 4: Simplify right side
    21,320.70x = 366,650,585.45
  5. Step 5: Solve for x
    x = 366,650,585.45/21,320.70
  6. Step 6: Final answer
    x = 17,196.93

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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.