Home / 5,390.42-8,085.56-2,105.80

Finding the Fourth Proportional to 5,390.42, 8,085.56 and 2,105.80

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Solution

The fourth proportional to 5,390.42, 8,085.56 and 2,105.80 is: 3,158.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.42 : 8,085.56 = 2,105.80 : x
  2. Step 2: Convert to fraction form
    5,390.42/8,085.56 = 2,105.80/x
  3. Step 3: Cross multiply
    5,390.42x = 8,085.56 × 2,105.80
  4. Step 4: Simplify right side
    5,390.42x = 17,026,541.51
  5. Step 5: Solve for x
    x = 17,026,541.51/5,390.42
  6. Step 6: Final answer
    x = 3,158.67

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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.