Home / 7,758.40-10,706.28-4,221.54

Finding the Fourth Proportional to 7,758.40, 10,706.28 and 4,221.54

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Solution

The fourth proportional to 7,758.40, 10,706.28 and 4,221.54 is: 5,825.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,758.40 : 10,706.28 = 4,221.54 : x
  2. Step 2: Convert to fraction form
    7,758.40/10,706.28 = 4,221.54/x
  3. Step 3: Cross multiply
    7,758.40x = 10,706.28 × 4,221.54
  4. Step 4: Simplify right side
    7,758.40x = 45,196,989.27
  5. Step 5: Solve for x
    x = 45,196,989.27/7,758.40
  6. Step 6: Final answer
    x = 5,825.56

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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.