Home / 13,072.15-18,039.40-7,103.67

Finding the Fourth Proportional to 13,072.15, 18,039.40 and 7,103.67

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Solution

The fourth proportional to 13,072.15, 18,039.40 and 7,103.67 is: 9,802.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,072.15 : 18,039.40 = 7,103.67 : x
  2. Step 2: Convert to fraction form
    13,072.15/18,039.40 = 7,103.67/x
  3. Step 3: Cross multiply
    13,072.15x = 18,039.40 × 7,103.67
  4. Step 4: Simplify right side
    13,072.15x = 128,145,944.60
  5. Step 5: Solve for x
    x = 128,145,944.60/13,072.15
  6. Step 6: Final answer
    x = 9,802.97

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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.