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Finding the Fourth Proportional to 38,447.56, 53,057.64 and 21,680.56

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Solution

The fourth proportional to 38,447.56, 53,057.64 and 21,680.56 is: 29,919.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,447.56 : 53,057.64 = 21,680.56 : x
  2. Step 2: Convert to fraction form
    38,447.56/53,057.64 = 21,680.56/x
  3. Step 3: Cross multiply
    38,447.56x = 53,057.64 × 21,680.56
  4. Step 4: Simplify right side
    38,447.56x = 1,150,319,347.48
  5. Step 5: Solve for x
    x = 1,150,319,347.48/38,447.56
  6. Step 6: Final answer
    x = 29,919.18

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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.