Home / 57,981.20-86,971.80-18,539.60

Finding the Fourth Proportional to 57,981.20, 86,971.80 and 18,539.60

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Solution

The fourth proportional to 57,981.20, 86,971.80 and 18,539.60 is: 27,809.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,981.20 : 86,971.80 = 18,539.60 : x
  2. Step 2: Convert to fraction form
    57,981.20/86,971.80 = 18,539.60/x
  3. Step 3: Cross multiply
    57,981.20x = 86,971.80 × 18,539.60
  4. Step 4: Simplify right side
    57,981.20x = 1,612,422,383.28
  5. Step 5: Solve for x
    x = 1,612,422,383.28/57,981.20
  6. Step 6: Final answer
    x = 27,809.40

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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.