Home / 21,781.56-30,064.95-14,229.09

Finding the Fourth Proportional to 21,781.56, 30,064.95 and 14,229.09

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Solution

The fourth proportional to 21,781.56, 30,064.95 and 14,229.09 is: 19,640.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.56 : 30,064.95 = 14,229.09 : x
  2. Step 2: Convert to fraction form
    21,781.56/30,064.95 = 14,229.09/x
  3. Step 3: Cross multiply
    21,781.56x = 30,064.95 × 14,229.09
  4. Step 4: Simplify right side
    21,781.56x = 427,796,879.40
  5. Step 5: Solve for x
    x = 427,796,879.40/21,781.56
  6. Step 6: Final answer
    x = 19,640.32

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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.