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Finding the Fourth Proportional to 38,479.72, 53,101.74 and 21,482.96

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Solution

The fourth proportional to 38,479.72, 53,101.74 and 21,482.96 is: 29,646.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,479.72 : 53,101.74 = 21,482.96 : x
  2. Step 2: Convert to fraction form
    38,479.72/53,101.74 = 21,482.96/x
  3. Step 3: Cross multiply
    38,479.72x = 53,101.74 × 21,482.96
  4. Step 4: Simplify right side
    38,479.72x = 1,140,782,556.35
  5. Step 5: Solve for x
    x = 1,140,782,556.35/38,479.72
  6. Step 6: Final answer
    x = 29,646.33

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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.