Home / 5,613.81-8,421.32-2,105.49

Finding the Fourth Proportional to 5,613.81, 8,421.32 and 2,105.49

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Solution

The fourth proportional to 5,613.81, 8,421.32 and 2,105.49 is: 3,158.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,613.81 : 8,421.32 = 2,105.49 : x
  2. Step 2: Convert to fraction form
    5,613.81/8,421.32 = 2,105.49/x
  3. Step 3: Cross multiply
    5,613.81x = 8,421.32 × 2,105.49
  4. Step 4: Simplify right side
    5,613.81x = 17,731,030.05
  5. Step 5: Solve for x
    x = 17,731,030.05/5,613.81
  6. Step 6: Final answer
    x = 3,158.47

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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.