Home / 39,483.28-54,485.32-21,578.88

Finding the Fourth Proportional to 39,483.28, 54,485.32 and 21,578.88

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Solution

The fourth proportional to 39,483.28, 54,485.32 and 21,578.88 is: 29,777.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,483.28 : 54,485.32 = 21,578.88 : x
  2. Step 2: Convert to fraction form
    39,483.28/54,485.32 = 21,578.88/x
  3. Step 3: Cross multiply
    39,483.28x = 54,485.32 × 21,578.88
  4. Step 4: Simplify right side
    39,483.28x = 1,175,732,182.04
  5. Step 5: Solve for x
    x = 1,175,732,182.04/39,483.28
  6. Step 6: Final answer
    x = 29,777.98

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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.