Home / 13,211.60-18,218.40-9,231.26

Finding the Fourth Proportional to 13,211.60, 18,218.40 and 9,231.26

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Solution

The fourth proportional to 13,211.60, 18,218.40 and 9,231.26 is: 12,729.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.60 : 18,218.40 = 9,231.26 : x
  2. Step 2: Convert to fraction form
    13,211.60/18,218.40 = 9,231.26/x
  3. Step 3: Cross multiply
    13,211.60x = 18,218.40 × 9,231.26
  4. Step 4: Simplify right side
    13,211.60x = 168,178,787.18
  5. Step 5: Solve for x
    x = 168,178,787.18/13,211.60
  6. Step 6: Final answer
    x = 12,729.63

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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.