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Finding the Fourth Proportional to 57,872.92, 86,809.59 and 20,412.64

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Solution

The fourth proportional to 57,872.92, 86,809.59 and 20,412.64 is: 30,619.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,872.92 : 86,809.59 = 20,412.64 : x
  2. Step 2: Convert to fraction form
    57,872.92/86,809.59 = 20,412.64/x
  3. Step 3: Cross multiply
    57,872.92x = 86,809.59 × 20,412.64
  4. Step 4: Simplify right side
    57,872.92x = 1,772,012,909.22
  5. Step 5: Solve for x
    x = 1,772,012,909.22/57,872.92
  6. Step 6: Final answer
    x = 30,619.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.