Home / 21,400.09-29,541.58-12,789.31

Finding the Fourth Proportional to 21,400.09, 29,541.58 and 12,789.31

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Solution

The fourth proportional to 21,400.09, 29,541.58 and 12,789.31 is: 17,654.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,400.09 : 29,541.58 = 12,789.31 : x
  2. Step 2: Convert to fraction form
    21,400.09/29,541.58 = 12,789.31/x
  3. Step 3: Cross multiply
    21,400.09x = 29,541.58 × 12,789.31
  4. Step 4: Simplify right side
    21,400.09x = 377,816,424.51
  5. Step 5: Solve for x
    x = 377,816,424.51/21,400.09
  6. Step 6: Final answer
    x = 17,654.90

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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.