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Finding the Fourth Proportional to 8,670.49, 12,995.80 and 4,230.47

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Solution

The fourth proportional to 8,670.49, 12,995.80 and 4,230.47 is: 6,340.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,670.49 : 12,995.80 = 4,230.47 : x
  2. Step 2: Convert to fraction form
    8,670.49/12,995.80 = 4,230.47/x
  3. Step 3: Cross multiply
    8,670.49x = 12,995.80 × 4,230.47
  4. Step 4: Simplify right side
    8,670.49x = 54,978,342.03
  5. Step 5: Solve for x
    x = 54,978,342.03/8,670.49
  6. Step 6: Final answer
    x = 6,340.86

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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.