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Finding the Fourth Proportional to 5,642.21, 7,786.23 and 3,158.21

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Solution

The fourth proportional to 5,642.21, 7,786.23 and 3,158.21 is: 4,358.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,642.21 : 7,786.23 = 3,158.21 : x
  2. Step 2: Convert to fraction form
    5,642.21/7,786.23 = 3,158.21/x
  3. Step 3: Cross multiply
    5,642.21x = 7,786.23 × 3,158.21
  4. Step 4: Simplify right side
    5,642.21x = 24,590,549.45
  5. Step 5: Solve for x
    x = 24,590,549.45/5,642.21
  6. Step 6: Final answer
    x = 4,358.32

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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.