Home / 38,726.11-53,438.74-21,728.05

Finding the Fourth Proportional to 38,726.11, 53,438.74 and 21,728.05

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Solution

The fourth proportional to 38,726.11, 53,438.74 and 21,728.05 is: 29,982.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,726.11 : 53,438.74 = 21,728.05 : x
  2. Step 2: Convert to fraction form
    38,726.11/53,438.74 = 21,728.05/x
  3. Step 3: Cross multiply
    38,726.11x = 53,438.74 × 21,728.05
  4. Step 4: Simplify right side
    38,726.11x = 1,161,119,614.66
  5. Step 5: Solve for x
    x = 1,161,119,614.66/38,726.11
  6. Step 6: Final answer
    x = 29,982.86

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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.