Home / 39,789-54,909.27-21,884.30

Finding the Fourth Proportional to 39,789, 54,909.27 and 21,884.30

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Solution

The fourth proportional to 39,789, 54,909.27 and 21,884.30 is: 30,200.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,789 : 54,909.27 = 21,884.30 : x
  2. Step 2: Convert to fraction form
    39,789/54,909.27 = 21,884.30/x
  3. Step 3: Cross multiply
    39,789x = 54,909.27 × 21,884.30
  4. Step 4: Simplify right side
    39,789x = 1,201,650,937.46
  5. Step 5: Solve for x
    x = 1,201,650,937.46/39,789
  6. Step 6: Final answer
    x = 30,200.58

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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.