Home / 21,370.10-29,490.82-11,938.82

Finding the Fourth Proportional to 21,370.10, 29,490.82 and 11,938.82

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Solution

The fourth proportional to 21,370.10, 29,490.82 and 11,938.82 is: 16,475.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,370.10 : 29,490.82 = 11,938.82 : x
  2. Step 2: Convert to fraction form
    21,370.10/29,490.82 = 11,938.82/x
  3. Step 3: Cross multiply
    21,370.10x = 29,490.82 × 11,938.82
  4. Step 4: Simplify right side
    21,370.10x = 352,085,591.63
  5. Step 5: Solve for x
    x = 352,085,591.63/21,370.10
  6. Step 6: Final answer
    x = 16,475.62

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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.