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Finding the Fourth Proportional to 38,763.88, 53,489.55 and 21,764.41

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Solution

The fourth proportional to 38,763.88, 53,489.55 and 21,764.41 is: 30,032.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,763.88 : 53,489.55 = 21,764.41 : x
  2. Step 2: Convert to fraction form
    38,763.88/53,489.55 = 21,764.41/x
  3. Step 3: Cross multiply
    38,763.88x = 53,489.55 × 21,764.41
  4. Step 4: Simplify right side
    38,763.88x = 1,164,168,496.92
  5. Step 5: Solve for x
    x = 1,164,168,496.92/38,763.88
  6. Step 6: Final answer
    x = 30,032.30

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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.