Home / 39,690.28-54,771.70-21,785.16

Finding the Fourth Proportional to 39,690.28, 54,771.70 and 21,785.16

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Solution

The fourth proportional to 39,690.28, 54,771.70 and 21,785.16 is: 30,063.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,690.28 : 54,771.70 = 21,785.16 : x
  2. Step 2: Convert to fraction form
    39,690.28/54,771.70 = 21,785.16/x
  3. Step 3: Cross multiply
    39,690.28x = 54,771.70 × 21,785.16
  4. Step 4: Simplify right side
    39,690.28x = 1,193,210,247.97
  5. Step 5: Solve for x
    x = 1,193,210,247.97/39,690.28
  6. Step 6: Final answer
    x = 30,063.03

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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.