Home / 39,287.63-54,218.09-21,383.80

Finding the Fourth Proportional to 39,287.63, 54,218.09 and 21,383.80

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Solution

The fourth proportional to 39,287.63, 54,218.09 and 21,383.80 is: 29,510.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,287.63 : 54,218.09 = 21,383.80 : x
  2. Step 2: Convert to fraction form
    39,287.63/54,218.09 = 21,383.80/x
  3. Step 3: Cross multiply
    39,287.63x = 54,218.09 × 21,383.80
  4. Step 4: Simplify right side
    39,287.63x = 1,159,388,710.86
  5. Step 5: Solve for x
    x = 1,159,388,710.86/39,287.63
  6. Step 6: Final answer
    x = 29,510.27

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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.