Home / 21,370.50-29,490.75-11,939.13

Finding the Fourth Proportional to 21,370.50, 29,490.75 and 11,939.13

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Solution

The fourth proportional to 21,370.50, 29,490.75 and 11,939.13 is: 16,475.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,370.50 : 29,490.75 = 11,939.13 : x
  2. Step 2: Convert to fraction form
    21,370.50/29,490.75 = 11,939.13/x
  3. Step 3: Cross multiply
    21,370.50x = 29,490.75 × 11,939.13
  4. Step 4: Simplify right side
    21,370.50x = 352,093,898.05
  5. Step 5: Solve for x
    x = 352,093,898.05/21,370.50
  6. Step 6: Final answer
    x = 16,475.70

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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.