Home / 38,905.43-53,688.78-21,909.60

Finding the Fourth Proportional to 38,905.43, 53,688.78 and 21,909.60

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Solution

The fourth proportional to 38,905.43, 53,688.78 and 21,909.60 is: 30,234.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,905.43 : 53,688.78 = 21,909.60 : x
  2. Step 2: Convert to fraction form
    38,905.43/53,688.78 = 21,909.60/x
  3. Step 3: Cross multiply
    38,905.43x = 53,688.78 × 21,909.60
  4. Step 4: Simplify right side
    38,905.43x = 1,176,299,694.29
  5. Step 5: Solve for x
    x = 1,176,299,694.29/38,905.43
  6. Step 6: Final answer
    x = 30,234.85

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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.