Home / 39,719.51-54,813.88-21,814.90

Finding the Fourth Proportional to 39,719.51, 54,813.88 and 21,814.90

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Solution

The fourth proportional to 39,719.51, 54,813.88 and 21,814.90 is: 30,105.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,719.51 : 54,813.88 = 21,814.90 : x
  2. Step 2: Convert to fraction form
    39,719.51/54,813.88 = 21,814.90/x
  3. Step 3: Cross multiply
    39,719.51x = 54,813.88 × 21,814.90
  4. Step 4: Simplify right side
    39,719.51x = 1,195,759,310.81
  5. Step 5: Solve for x
    x = 1,195,759,310.81/39,719.51
  6. Step 6: Final answer
    x = 30,105.09

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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.