Home / 39,721.68-54,816.48-21,818.28

Finding the Fourth Proportional to 39,721.68, 54,816.48 and 21,818.28

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Solution

The fourth proportional to 39,721.68, 54,816.48 and 21,818.28 is: 30,109.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.68 : 54,816.48 = 21,818.28 : x
  2. Step 2: Convert to fraction form
    39,721.68/54,816.48 = 21,818.28/x
  3. Step 3: Cross multiply
    39,721.68x = 54,816.48 × 21,818.28
  4. Step 4: Simplify right side
    39,721.68x = 1,196,001,309.25
  5. Step 5: Solve for x
    x = 1,196,001,309.25/39,721.68
  6. Step 6: Final answer
    x = 30,109.53

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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.