Home / 13,382.35-20,079.60-7,143.86

Finding the Fourth Proportional to 13,382.35, 20,079.60 and 7,143.86

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Solution

The fourth proportional to 13,382.35, 20,079.60 and 7,143.86 is: 10,719.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,382.35 : 20,079.60 = 7,143.86 : x
  2. Step 2: Convert to fraction form
    13,382.35/20,079.60 = 7,143.86/x
  3. Step 3: Cross multiply
    13,382.35x = 20,079.60 × 7,143.86
  4. Step 4: Simplify right side
    13,382.35x = 143,445,851.26
  5. Step 5: Solve for x
    x = 143,445,851.26/13,382.35
  6. Step 6: Final answer
    x = 10,719.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.