Home / 20,680.21-28,522.13-13,509.59

Finding the Fourth Proportional to 20,680.21, 28,522.13 and 13,509.59

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Solution

The fourth proportional to 20,680.21, 28,522.13 and 13,509.59 is: 18,632.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.21 : 28,522.13 = 13,509.59 : x
  2. Step 2: Convert to fraction form
    20,680.21/28,522.13 = 13,509.59/x
  3. Step 3: Cross multiply
    20,680.21x = 28,522.13 × 13,509.59
  4. Step 4: Simplify right side
    20,680.21x = 385,322,072.07
  5. Step 5: Solve for x
    x = 385,322,072.07/20,680.21
  6. Step 6: Final answer
    x = 18,632.41

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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.