Home / 8,721.05-13,081.57-7,700.45

Finding the Fourth Proportional to 8,721.05, 13,081.57 and 7,700.45

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Solution

The fourth proportional to 8,721.05, 13,081.57 and 7,700.45 is: 11,550.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.05 : 13,081.57 = 7,700.45 : x
  2. Step 2: Convert to fraction form
    8,721.05/13,081.57 = 7,700.45/x
  3. Step 3: Cross multiply
    8,721.05x = 13,081.57 × 7,700.45
  4. Step 4: Simplify right side
    8,721.05x = 100,733,891.05
  5. Step 5: Solve for x
    x = 100,733,891.05/8,721.05
  6. Step 6: Final answer
    x = 11,550.67

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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.