Home / 28,720.90-39,634.32-15,974.02

Finding the Fourth Proportional to 28,720.90, 39,634.32 and 15,974.02

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Solution

The fourth proportional to 28,720.90, 39,634.32 and 15,974.02 is: 22,043.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.90 : 39,634.32 = 15,974.02 : x
  2. Step 2: Convert to fraction form
    28,720.90/39,634.32 = 15,974.02/x
  3. Step 3: Cross multiply
    28,720.90x = 39,634.32 × 15,974.02
  4. Step 4: Simplify right side
    28,720.90x = 633,119,420.37
  5. Step 5: Solve for x
    x = 633,119,420.37/28,720.90
  6. Step 6: Final answer
    x = 22,043.86

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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.