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Finding the Fourth Proportional to 38,930.70, 53,724.36 and 21,025.70

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Solution

The fourth proportional to 38,930.70, 53,724.36 and 21,025.70 is: 29,015.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,930.70 : 53,724.36 = 21,025.70 : x
  2. Step 2: Convert to fraction form
    38,930.70/53,724.36 = 21,025.70/x
  3. Step 3: Cross multiply
    38,930.70x = 53,724.36 × 21,025.70
  4. Step 4: Simplify right side
    38,930.70x = 1,129,592,276.05
  5. Step 5: Solve for x
    x = 1,129,592,276.05/38,930.70
  6. Step 6: Final answer
    x = 29,015.46

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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.