Home / 39,483.28-54,485.30-21,578.90

Finding the Fourth Proportional to 39,483.28, 54,485.30 and 21,578.90

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Solution

The fourth proportional to 39,483.28, 54,485.30 and 21,578.90 is: 29,777.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,483.28 : 54,485.30 = 21,578.90 : x
  2. Step 2: Convert to fraction form
    39,483.28/54,485.30 = 21,578.90/x
  3. Step 3: Cross multiply
    39,483.28x = 54,485.30 × 21,578.90
  4. Step 4: Simplify right side
    39,483.28x = 1,175,732,840.17
  5. Step 5: Solve for x
    x = 1,175,732,840.17/39,483.28
  6. Step 6: Final answer
    x = 29,777.99

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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.