Home / 39,721.65-54,816.84-21,817.05

Finding the Fourth Proportional to 39,721.65, 54,816.84 and 21,817.05

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Solution

The fourth proportional to 39,721.65, 54,816.84 and 21,817.05 is: 30,108.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.65 : 54,816.84 = 21,817.05 : x
  2. Step 2: Convert to fraction form
    39,721.65/54,816.84 = 21,817.05/x
  3. Step 3: Cross multiply
    39,721.65x = 54,816.84 × 21,817.05
  4. Step 4: Simplify right side
    39,721.65x = 1,195,941,739.12
  5. Step 5: Solve for x
    x = 1,195,941,739.12/39,721.65
  6. Step 6: Final answer
    x = 30,108.06

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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.