Home / 15,087.72-20,820.85-8,373.32

Finding the Fourth Proportional to 15,087.72, 20,820.85 and 8,373.32

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Solution

The fourth proportional to 15,087.72, 20,820.85 and 8,373.32 is: 11,555.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,087.72 : 20,820.85 = 8,373.32 : x
  2. Step 2: Convert to fraction form
    15,087.72/20,820.85 = 8,373.32/x
  3. Step 3: Cross multiply
    15,087.72x = 20,820.85 × 8,373.32
  4. Step 4: Simplify right side
    15,087.72x = 174,339,709.88
  5. Step 5: Solve for x
    x = 174,339,709.88/15,087.72
  6. Step 6: Final answer
    x = 11,555.07

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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.