Home / 13,278.60-18,321.34-9,735.64

Finding the Fourth Proportional to 13,278.60, 18,321.34 and 9,735.64

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Solution

The fourth proportional to 13,278.60, 18,321.34 and 9,735.64 is: 13,432.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.60 : 18,321.34 = 9,735.64 : x
  2. Step 2: Convert to fraction form
    13,278.60/18,321.34 = 9,735.64/x
  3. Step 3: Cross multiply
    13,278.60x = 18,321.34 × 9,735.64
  4. Step 4: Simplify right side
    13,278.60x = 178,369,970.56
  5. Step 5: Solve for x
    x = 178,369,970.56/13,278.60
  6. Step 6: Final answer
    x = 13,432.89

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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.