Home / 20,803.75-28,709.36-11,372.32

Finding the Fourth Proportional to 20,803.75, 28,709.36 and 11,372.32

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Solution

The fourth proportional to 20,803.75, 28,709.36 and 11,372.32 is: 15,693.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.75 : 28,709.36 = 11,372.32 : x
  2. Step 2: Convert to fraction form
    20,803.75/28,709.36 = 11,372.32/x
  3. Step 3: Cross multiply
    20,803.75x = 28,709.36 × 11,372.32
  4. Step 4: Simplify right side
    20,803.75x = 326,492,028.92
  5. Step 5: Solve for x
    x = 326,492,028.92/20,803.75
  6. Step 6: Final answer
    x = 15,693.90

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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.