Home / 12,586.30-18,865.60-5,186.72

Finding the Fourth Proportional to 12,586.30, 18,865.60 and 5,186.72

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Solution

The fourth proportional to 12,586.30, 18,865.60 and 5,186.72 is: 7,774.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,586.30 : 18,865.60 = 5,186.72 : x
  2. Step 2: Convert to fraction form
    12,586.30/18,865.60 = 5,186.72/x
  3. Step 3: Cross multiply
    12,586.30x = 18,865.60 × 5,186.72
  4. Step 4: Simplify right side
    12,586.30x = 97,850,619.03
  5. Step 5: Solve for x
    x = 97,850,619.03/12,586.30
  6. Step 6: Final answer
    x = 7,774.38

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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.