Home / 54,207.36-81,278.64-20,899.80

Finding the Fourth Proportional to 54,207.36, 81,278.64 and 20,899.80

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Solution

The fourth proportional to 54,207.36, 81,278.64 and 20,899.80 is: 31,337.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,207.36 : 81,278.64 = 20,899.80 : x
  2. Step 2: Convert to fraction form
    54,207.36/81,278.64 = 20,899.80/x
  3. Step 3: Cross multiply
    54,207.36x = 81,278.64 × 20,899.80
  4. Step 4: Simplify right side
    54,207.36x = 1,698,707,320.27
  5. Step 5: Solve for x
    x = 1,698,707,320.27/54,207.36
  6. Step 6: Final answer
    x = 31,337.21

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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.