Home / 7,140.65-10,715.03-2,758.42

Finding the Fourth Proportional to 7,140.65, 10,715.03 and 2,758.42

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Solution

The fourth proportional to 7,140.65, 10,715.03 and 2,758.42 is: 4,139.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.65 : 10,715.03 = 2,758.42 : x
  2. Step 2: Convert to fraction form
    7,140.65/10,715.03 = 2,758.42/x
  3. Step 3: Cross multiply
    7,140.65x = 10,715.03 × 2,758.42
  4. Step 4: Simplify right side
    7,140.65x = 29,556,485.69
  5. Step 5: Solve for x
    x = 29,556,485.69/7,140.65
  6. Step 6: Final answer
    x = 4,139.19

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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.