Home / 38,759.79-53,488.88-21,991.47

Finding the Fourth Proportional to 38,759.79, 53,488.88 and 21,991.47

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Solution

The fourth proportional to 38,759.79, 53,488.88 and 21,991.47 is: 30,348.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,759.79 : 53,488.88 = 21,991.47 : x
  2. Step 2: Convert to fraction form
    38,759.79/53,488.88 = 21,991.47/x
  3. Step 3: Cross multiply
    38,759.79x = 53,488.88 × 21,991.47
  4. Step 4: Simplify right side
    38,759.79x = 1,176,298,989.90
  5. Step 5: Solve for x
    x = 1,176,298,989.90/38,759.79
  6. Step 6: Final answer
    x = 30,348.44

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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.