Home / 21,021.63-29,021.73-13,957.71

Finding the Fourth Proportional to 21,021.63, 29,021.73 and 13,957.71

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Solution

The fourth proportional to 21,021.63, 29,021.73 and 13,957.71 is: 19,269.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.63 : 29,021.73 = 13,957.71 : x
  2. Step 2: Convert to fraction form
    21,021.63/29,021.73 = 13,957.71/x
  3. Step 3: Cross multiply
    21,021.63x = 29,021.73 × 13,957.71
  4. Step 4: Simplify right side
    21,021.63x = 405,076,891.04
  5. Step 5: Solve for x
    x = 405,076,891.04/21,021.63
  6. Step 6: Final answer
    x = 19,269.53

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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.