Home / 21,151.92-31,693.84-13,774.44

Finding the Fourth Proportional to 21,151.92, 31,693.84 and 13,774.44

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Solution

The fourth proportional to 21,151.92, 31,693.84 and 13,774.44 is: 20,639.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.92 : 31,693.84 = 13,774.44 : x
  2. Step 2: Convert to fraction form
    21,151.92/31,693.84 = 13,774.44/x
  3. Step 3: Cross multiply
    21,151.92x = 31,693.84 × 13,774.44
  4. Step 4: Simplify right side
    21,151.92x = 436,564,897.45
  5. Step 5: Solve for x
    x = 436,564,897.45/21,151.92
  6. Step 6: Final answer
    x = 20,639.49

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1.5x scale

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.