Home / 39,810.87-54,938.25-21,905.55

Finding the Fourth Proportional to 39,810.87, 54,938.25 and 21,905.55

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Solution

The fourth proportional to 39,810.87, 54,938.25 and 21,905.55 is: 30,229.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,810.87 : 54,938.25 = 21,905.55 : x
  2. Step 2: Convert to fraction form
    39,810.87/54,938.25 = 21,905.55/x
  3. Step 3: Cross multiply
    39,810.87x = 54,938.25 × 21,905.55
  4. Step 4: Simplify right side
    39,810.87x = 1,203,452,582.29
  5. Step 5: Solve for x
    x = 1,203,452,582.29/39,810.87
  6. Step 6: Final answer
    x = 30,229.25

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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.