Home / 39,213.12-54,114.36-21,308.28

Finding the Fourth Proportional to 39,213.12, 54,114.36 and 21,308.28

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Solution

The fourth proportional to 39,213.12, 54,114.36 and 21,308.28 is: 29,405.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,213.12 : 54,114.36 = 21,308.28 : x
  2. Step 2: Convert to fraction form
    39,213.12/54,114.36 = 21,308.28/x
  3. Step 3: Cross multiply
    39,213.12x = 54,114.36 × 21,308.28
  4. Step 4: Simplify right side
    39,213.12x = 1,153,083,934.90
  5. Step 5: Solve for x
    x = 1,153,083,934.90/39,213.12
  6. Step 6: Final answer
    x = 29,405.56

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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.