Home / 39,689.70-54,771.44-21,785.46

Finding the Fourth Proportional to 39,689.70, 54,771.44 and 21,785.46

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Solution

The fourth proportional to 39,689.70, 54,771.44 and 21,785.46 is: 30,063.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,689.70 : 54,771.44 = 21,785.46 : x
  2. Step 2: Convert to fraction form
    39,689.70/54,771.44 = 21,785.46/x
  3. Step 3: Cross multiply
    39,689.70x = 54,771.44 × 21,785.46
  4. Step 4: Simplify right side
    39,689.70x = 1,193,221,015.26
  5. Step 5: Solve for x
    x = 1,193,221,015.26/39,689.70
  6. Step 6: Final answer
    x = 30,063.74

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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.