Home / 21,378.46-29,498.97-11,945.20

Finding the Fourth Proportional to 21,378.46, 29,498.97 and 11,945.20

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Solution

The fourth proportional to 21,378.46, 29,498.97 and 11,945.20 is: 16,482.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.46 : 29,498.97 = 11,945.20 : x
  2. Step 2: Convert to fraction form
    21,378.46/29,498.97 = 11,945.20/x
  3. Step 3: Cross multiply
    21,378.46x = 29,498.97 × 11,945.20
  4. Step 4: Simplify right side
    21,378.46x = 352,371,096.44
  5. Step 5: Solve for x
    x = 352,371,096.44/21,378.46
  6. Step 6: Final answer
    x = 16,482.53

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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.