Home / 39,638.09-54,697.86-21,729.39

Finding the Fourth Proportional to 39,638.09, 54,697.86 and 21,729.39

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Solution

The fourth proportional to 39,638.09, 54,697.86 and 21,729.39 is: 29,985.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,638.09 : 54,697.86 = 21,729.39 : x
  2. Step 2: Convert to fraction form
    39,638.09/54,697.86 = 21,729.39/x
  3. Step 3: Cross multiply
    39,638.09x = 54,697.86 × 21,729.39
  4. Step 4: Simplify right side
    39,638.09x = 1,188,551,132.11
  5. Step 5: Solve for x
    x = 1,188,551,132.11/39,638.09
  6. Step 6: Final answer
    x = 29,985.08

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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.