Home / 7,321.12-10,107.80-4,807.69

Finding the Fourth Proportional to 7,321.12, 10,107.80 and 4,807.69

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Solution

The fourth proportional to 7,321.12, 10,107.80 and 4,807.69 is: 6,637.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.12 : 10,107.80 = 4,807.69 : x
  2. Step 2: Convert to fraction form
    7,321.12/10,107.80 = 4,807.69/x
  3. Step 3: Cross multiply
    7,321.12x = 10,107.80 × 4,807.69
  4. Step 4: Simplify right side
    7,321.12x = 48,595,168.98
  5. Step 5: Solve for x
    x = 48,595,168.98/7,321.12
  6. Step 6: Final answer
    x = 6,637.67

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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.