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Finding the Fourth Proportional to 8,674.40, 13,011.60 and 5,175.20

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Solution

The fourth proportional to 8,674.40, 13,011.60 and 5,175.20 is: 7,762.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,674.40 : 13,011.60 = 5,175.20 : x
  2. Step 2: Convert to fraction form
    8,674.40/13,011.60 = 5,175.20/x
  3. Step 3: Cross multiply
    8,674.40x = 13,011.60 × 5,175.20
  4. Step 4: Simplify right side
    8,674.40x = 67,337,632.32
  5. Step 5: Solve for x
    x = 67,337,632.32/8,674.40
  6. Step 6: Final answer
    x = 7,762.80

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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.