Home / 28,919.30-39,907.88-15,999.05

Finding the Fourth Proportional to 28,919.30, 39,907.88 and 15,999.05

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Solution

The fourth proportional to 28,919.30, 39,907.88 and 15,999.05 is: 22,078.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,919.30 : 39,907.88 = 15,999.05 : x
  2. Step 2: Convert to fraction form
    28,919.30/39,907.88 = 15,999.05/x
  3. Step 3: Cross multiply
    28,919.30x = 39,907.88 × 15,999.05
  4. Step 4: Simplify right side
    28,919.30x = 638,487,887.98
  5. Step 5: Solve for x
    x = 638,487,887.98/28,919.30
  6. Step 6: Final answer
    x = 22,078.27

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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.