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Finding the Fourth Proportional to 38,930.86, 53,724.60 and 21,025.88

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Solution

The fourth proportional to 38,930.86, 53,724.60 and 21,025.88 is: 29,015.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,930.86 : 53,724.60 = 21,025.88 : x
  2. Step 2: Convert to fraction form
    38,930.86/53,724.60 = 21,025.88/x
  3. Step 3: Cross multiply
    38,930.86x = 53,724.60 × 21,025.88
  4. Step 4: Simplify right side
    38,930.86x = 1,129,606,925.49
  5. Step 5: Solve for x
    x = 1,129,606,925.49/38,930.86
  6. Step 6: Final answer
    x = 29,015.72

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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.