Home / 21,669.93-29,893.42-14,128.90

Finding the Fourth Proportional to 21,669.93, 29,893.42 and 14,128.90

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Solution

The fourth proportional to 21,669.93, 29,893.42 and 14,128.90 is: 19,490.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,669.93 : 29,893.42 = 14,128.90 : x
  2. Step 2: Convert to fraction form
    21,669.93/29,893.42 = 14,128.90/x
  3. Step 3: Cross multiply
    21,669.93x = 29,893.42 × 14,128.90
  4. Step 4: Simplify right side
    21,669.93x = 422,361,084.77
  5. Step 5: Solve for x
    x = 422,361,084.77/21,669.93
  6. Step 6: Final answer
    x = 19,490.65

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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.