Home / 20,382.45-28,089.69-15,899.10

Finding the Fourth Proportional to 20,382.45, 28,089.69 and 15,899.10

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Solution

The fourth proportional to 20,382.45, 28,089.69 and 15,899.10 is: 21,911.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.45 : 28,089.69 = 15,899.10 : x
  2. Step 2: Convert to fraction form
    20,382.45/28,089.69 = 15,899.10/x
  3. Step 3: Cross multiply
    20,382.45x = 28,089.69 × 15,899.10
  4. Step 4: Simplify right side
    20,382.45x = 446,600,720.05
  5. Step 5: Solve for x
    x = 446,600,720.05/20,382.45
  6. Step 6: Final answer
    x = 21,911.04

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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.