Home / 39,805.10-54,929.04-21,899.64

Finding the Fourth Proportional to 39,805.10, 54,929.04 and 21,899.64

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Solution

The fourth proportional to 39,805.10, 54,929.04 and 21,899.64 is: 30,220.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,805.10 : 54,929.04 = 21,899.64 : x
  2. Step 2: Convert to fraction form
    39,805.10/54,929.04 = 21,899.64/x
  3. Step 3: Cross multiply
    39,805.10x = 54,929.04 × 21,899.64
  4. Step 4: Simplify right side
    39,805.10x = 1,202,926,201.55
  5. Step 5: Solve for x
    x = 1,202,926,201.55/39,805.10
  6. Step 6: Final answer
    x = 30,220.40

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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.