Home / 5,613.45-8,409.40-3,140.78

Finding the Fourth Proportional to 5,613.45, 8,409.40 and 3,140.78

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Solution

The fourth proportional to 5,613.45, 8,409.40 and 3,140.78 is: 4,705.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,613.45 : 8,409.40 = 3,140.78 : x
  2. Step 2: Convert to fraction form
    5,613.45/8,409.40 = 3,140.78/x
  3. Step 3: Cross multiply
    5,613.45x = 8,409.40 × 3,140.78
  4. Step 4: Simplify right side
    5,613.45x = 26,412,075.33
  5. Step 5: Solve for x
    x = 26,412,075.33/5,613.45
  6. Step 6: Final answer
    x = 4,705.14

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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.