Home / 8,621.40-11,899.80-5,085.75

Finding the Fourth Proportional to 8,621.40, 11,899.80 and 5,085.75

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Solution

The fourth proportional to 8,621.40, 11,899.80 and 5,085.75 is: 7,019.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,621.40 : 11,899.80 = 5,085.75 : x
  2. Step 2: Convert to fraction form
    8,621.40/11,899.80 = 5,085.75/x
  3. Step 3: Cross multiply
    8,621.40x = 11,899.80 × 5,085.75
  4. Step 4: Simplify right side
    8,621.40x = 60,519,407.85
  5. Step 5: Solve for x
    x = 60,519,407.85/8,621.40
  6. Step 6: Final answer
    x = 7,019.67

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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.