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Finding the Fourth Proportional to 38,453.76, 53,066.37 and 21,458.76

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Solution

The fourth proportional to 38,453.76, 53,066.37 and 21,458.76 is: 29,613.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,453.76 : 53,066.37 = 21,458.76 : x
  2. Step 2: Convert to fraction form
    38,453.76/53,066.37 = 21,458.76/x
  3. Step 3: Cross multiply
    38,453.76x = 53,066.37 × 21,458.76
  4. Step 4: Simplify right side
    38,453.76x = 1,138,738,497.90
  5. Step 5: Solve for x
    x = 1,138,738,497.90/38,453.76
  6. Step 6: Final answer
    x = 29,613.19

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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.