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Finding the Fourth Proportional to 8,571.18, 12,842.10 and 4,678.32

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Solution

The fourth proportional to 8,571.18, 12,842.10 and 4,678.32 is: 7,009.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,571.18 : 12,842.10 = 4,678.32 : x
  2. Step 2: Convert to fraction form
    8,571.18/12,842.10 = 4,678.32/x
  3. Step 3: Cross multiply
    8,571.18x = 12,842.10 × 4,678.32
  4. Step 4: Simplify right side
    8,571.18x = 60,079,453.27
  5. Step 5: Solve for x
    x = 60,079,453.27/8,571.18
  6. Step 6: Final answer
    x = 7,009.47

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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.