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Finding the Fourth Proportional to 8,455.67, 12,668.46 and 7,210.45

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Solution

The fourth proportional to 8,455.67, 12,668.46 and 7,210.45 is: 10,802.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,455.67 : 12,668.46 = 7,210.45 : x
  2. Step 2: Convert to fraction form
    8,455.67/12,668.46 = 7,210.45/x
  3. Step 3: Cross multiply
    8,455.67x = 12,668.46 × 7,210.45
  4. Step 4: Simplify right side
    8,455.67x = 91,345,313.24
  5. Step 5: Solve for x
    x = 91,345,313.24/8,455.67
  6. Step 6: Final answer
    x = 10,802.84

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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.