Home / 18,015.10-27,002.40-8,659.60

Finding the Fourth Proportional to 18,015.10, 27,002.40 and 8,659.60

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Solution

The fourth proportional to 18,015.10, 27,002.40 and 8,659.60 is: 12,979.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,015.10 : 27,002.40 = 8,659.60 : x
  2. Step 2: Convert to fraction form
    18,015.10/27,002.40 = 8,659.60/x
  3. Step 3: Cross multiply
    18,015.10x = 27,002.40 × 8,659.60
  4. Step 4: Simplify right side
    18,015.10x = 233,829,983.04
  5. Step 5: Solve for x
    x = 233,829,983.04/18,015.10
  6. Step 6: Final answer
    x = 12,979.67

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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.