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Finding the Fourth Proportional to 12,618.66, 18,927.99 and 4,298.88

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Solution

The fourth proportional to 12,618.66, 18,927.99 and 4,298.88 is: 6,448.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.66 : 18,927.99 = 4,298.88 : x
  2. Step 2: Convert to fraction form
    12,618.66/18,927.99 = 4,298.88/x
  3. Step 3: Cross multiply
    12,618.66x = 18,927.99 × 4,298.88
  4. Step 4: Simplify right side
    12,618.66x = 81,369,157.65
  5. Step 5: Solve for x
    x = 81,369,157.65/12,618.66
  6. Step 6: Final answer
    x = 6,448.32

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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.