Home / 12,312.82-18,461.80-5,188.56

Finding the Fourth Proportional to 12,312.82, 18,461.80 and 5,188.56

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Solution

The fourth proportional to 12,312.82, 18,461.80 and 5,188.56 is: 7,779.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,312.82 : 18,461.80 = 5,188.56 : x
  2. Step 2: Convert to fraction form
    12,312.82/18,461.80 = 5,188.56/x
  3. Step 3: Cross multiply
    12,312.82x = 18,461.80 × 5,188.56
  4. Step 4: Simplify right side
    12,312.82x = 95,790,157.01
  5. Step 5: Solve for x
    x = 95,790,157.01/12,312.82
  6. Step 6: Final answer
    x = 7,779.71

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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.