Home / 39,121.48-53,986.14-21,216.16

Finding the Fourth Proportional to 39,121.48, 53,986.14 and 21,216.16

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Solution

The fourth proportional to 39,121.48, 53,986.14 and 21,216.16 is: 29,277.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,121.48 : 53,986.14 = 21,216.16 : x
  2. Step 2: Convert to fraction form
    39,121.48/53,986.14 = 21,216.16/x
  3. Step 3: Cross multiply
    39,121.48x = 53,986.14 × 21,216.16
  4. Step 4: Simplify right side
    39,121.48x = 1,145,378,584.02
  5. Step 5: Solve for x
    x = 1,145,378,584.02/39,121.48
  6. Step 6: Final answer
    x = 29,277.49

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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.