Home / 7,709.53-10,639.13-4,172.80

Finding the Fourth Proportional to 7,709.53, 10,639.13 and 4,172.80

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Solution

The fourth proportional to 7,709.53, 10,639.13 and 4,172.80 is: 5,758.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,709.53 : 10,639.13 = 4,172.80 : x
  2. Step 2: Convert to fraction form
    7,709.53/10,639.13 = 4,172.80/x
  3. Step 3: Cross multiply
    7,709.53x = 10,639.13 × 4,172.80
  4. Step 4: Simplify right side
    7,709.53x = 44,394,961.66
  5. Step 5: Solve for x
    x = 44,394,961.66/7,709.53
  6. Step 6: Final answer
    x = 5,758.45

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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.