Home / 54,659.61-81,971.05-20,917.75

Finding the Fourth Proportional to 54,659.61, 81,971.05 and 20,917.75

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Solution

The fourth proportional to 54,659.61, 81,971.05 and 20,917.75 is: 31,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,659.61 : 81,971.05 = 20,917.75 : x
  2. Step 2: Convert to fraction form
    54,659.61/81,971.05 = 20,917.75/x
  3. Step 3: Cross multiply
    54,659.61x = 81,971.05 × 20,917.75
  4. Step 4: Simplify right side
    54,659.61x = 1,714,649,931.14
  5. Step 5: Solve for x
    x = 1,714,649,931.14/54,659.61
  6. Step 6: Final answer
    x = 31,369.60

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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.