Home / 13,091.21-18,065.95-7,122.92

Finding the Fourth Proportional to 13,091.21, 18,065.95 and 7,122.92

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Solution

The fourth proportional to 13,091.21, 18,065.95 and 7,122.92 is: 9,829.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,091.21 : 18,065.95 = 7,122.92 : x
  2. Step 2: Convert to fraction form
    13,091.21/18,065.95 = 7,122.92/x
  3. Step 3: Cross multiply
    13,091.21x = 18,065.95 × 7,122.92
  4. Step 4: Simplify right side
    13,091.21x = 128,682,280.96
  5. Step 5: Solve for x
    x = 128,682,280.96/13,091.21
  6. Step 6: Final answer
    x = 9,829.67

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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.