Home / 12,290.40-18,396.72-8,769.06

Finding the Fourth Proportional to 12,290.40, 18,396.72 and 8,769.06

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Solution

The fourth proportional to 12,290.40, 18,396.72 and 8,769.06 is: 13,125.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,290.40 : 18,396.72 = 8,769.06 : x
  2. Step 2: Convert to fraction form
    12,290.40/18,396.72 = 8,769.06/x
  3. Step 3: Cross multiply
    12,290.40x = 18,396.72 × 8,769.06
  4. Step 4: Simplify right side
    12,290.40x = 161,321,941.48
  5. Step 5: Solve for x
    x = 161,321,941.48/12,290.40
  6. Step 6: Final answer
    x = 13,125.85

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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.