Home / 18,867.16-28,299.60-7,771.12

Finding the Fourth Proportional to 18,867.16, 28,299.60 and 7,771.12

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Solution

The fourth proportional to 18,867.16, 28,299.60 and 7,771.12 is: 11,656.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,867.16 : 28,299.60 = 7,771.12 : x
  2. Step 2: Convert to fraction form
    18,867.16/28,299.60 = 7,771.12/x
  3. Step 3: Cross multiply
    18,867.16x = 28,299.60 × 7,771.12
  4. Step 4: Simplify right side
    18,867.16x = 219,919,587.55
  5. Step 5: Solve for x
    x = 219,919,587.55/18,867.16
  6. Step 6: Final answer
    x = 11,656.21

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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.