Home / 39,719.30-54,813.62-21,815.98

Finding the Fourth Proportional to 39,719.30, 54,813.62 and 21,815.98

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Solution

The fourth proportional to 39,719.30, 54,813.62 and 21,815.98 is: 30,106.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,719.30 : 54,813.62 = 21,815.98 : x
  2. Step 2: Convert to fraction form
    39,719.30/54,813.62 = 21,815.98/x
  3. Step 3: Cross multiply
    39,719.30x = 54,813.62 × 21,815.98
  4. Step 4: Simplify right side
    39,719.30x = 1,195,812,755.15
  5. Step 5: Solve for x
    x = 1,195,812,755.15/39,719.30
  6. Step 6: Final answer
    x = 30,106.60

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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.