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Finding the Fourth Proportional to 38,793.32, 53,535 and 21,798.28

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Solution

The fourth proportional to 38,793.32, 53,535 and 21,798.28 is: 30,081.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,793.32 : 53,535 = 21,798.28 : x
  2. Step 2: Convert to fraction form
    38,793.32/53,535 = 21,798.28/x
  3. Step 3: Cross multiply
    38,793.32x = 53,535 × 21,798.28
  4. Step 4: Simplify right side
    38,793.32x = 1,166,970,919.80
  5. Step 5: Solve for x
    x = 1,166,970,919.80/38,793.32
  6. Step 6: Final answer
    x = 30,081.75

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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.