Home / 13,206.24-18,222.30-7,538.40

Finding the Fourth Proportional to 13,206.24, 18,222.30 and 7,538.40

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Solution

The fourth proportional to 13,206.24, 18,222.30 and 7,538.40 is: 10,401.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,206.24 : 18,222.30 = 7,538.40 : x
  2. Step 2: Convert to fraction form
    13,206.24/18,222.30 = 7,538.40/x
  3. Step 3: Cross multiply
    13,206.24x = 18,222.30 × 7,538.40
  4. Step 4: Simplify right side
    13,206.24x = 137,366,986.32
  5. Step 5: Solve for x
    x = 137,366,986.32/13,206.24
  6. Step 6: Final answer
    x = 10,401.67

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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.