Home / 39,689.19-54,772.09-21,784.04

Finding the Fourth Proportional to 39,689.19, 54,772.09 and 21,784.04

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Solution

The fourth proportional to 39,689.19, 54,772.09 and 21,784.04 is: 30,062.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,689.19 : 54,772.09 = 21,784.04 : x
  2. Step 2: Convert to fraction form
    39,689.19/54,772.09 = 21,784.04/x
  3. Step 3: Cross multiply
    39,689.19x = 54,772.09 × 21,784.04
  4. Step 4: Simplify right side
    39,689.19x = 1,193,157,399.44
  5. Step 5: Solve for x
    x = 1,193,157,399.44/39,689.19
  6. Step 6: Final answer
    x = 30,062.53

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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.