Home / 39,721.77-54,816.21-21,816.32

Finding the Fourth Proportional to 39,721.77, 54,816.21 and 21,816.32

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Solution

The fourth proportional to 39,721.77, 54,816.21 and 21,816.32 is: 30,106.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.77 : 54,816.21 = 21,816.32 : x
  2. Step 2: Convert to fraction form
    39,721.77/54,816.21 = 21,816.32/x
  3. Step 3: Cross multiply
    39,721.77x = 54,816.21 × 21,816.32
  4. Step 4: Simplify right side
    39,721.77x = 1,195,887,704.47
  5. Step 5: Solve for x
    x = 1,195,887,704.47/39,721.77
  6. Step 6: Final answer
    x = 30,106.61

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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.