Home / 39,585.80-54,628.47-21,680.79

Finding the Fourth Proportional to 39,585.80, 54,628.47 and 21,680.79

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Solution

The fourth proportional to 39,585.80, 54,628.47 and 21,680.79 is: 29,919.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,585.80 : 54,628.47 = 21,680.79 : x
  2. Step 2: Convert to fraction form
    39,585.80/54,628.47 = 21,680.79/x
  3. Step 3: Cross multiply
    39,585.80x = 54,628.47 × 21,680.79
  4. Step 4: Simplify right side
    39,585.80x = 1,184,388,386.09
  5. Step 5: Solve for x
    x = 1,184,388,386.09/39,585.80
  6. Step 6: Final answer
    x = 29,919.53

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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.