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Finding the Fourth Proportional to 39,051.88, 53,891.56 and 21,146.88

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Solution

The fourth proportional to 39,051.88, 53,891.56 and 21,146.88 is: 29,182.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,051.88 : 53,891.56 = 21,146.88 : x
  2. Step 2: Convert to fraction form
    39,051.88/53,891.56 = 21,146.88/x
  3. Step 3: Cross multiply
    39,051.88x = 53,891.56 × 21,146.88
  4. Step 4: Simplify right side
    39,051.88x = 1,139,638,352.33
  5. Step 5: Solve for x
    x = 1,139,638,352.33/39,051.88
  6. Step 6: Final answer
    x = 29,182.68

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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.