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Finding the Fourth Proportional to 12,988.44, 17,924.06 and 8,216.89

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Solution

The fourth proportional to 12,988.44, 17,924.06 and 8,216.89 is: 11,339.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.44 : 17,924.06 = 8,216.89 : x
  2. Step 2: Convert to fraction form
    12,988.44/17,924.06 = 8,216.89/x
  3. Step 3: Cross multiply
    12,988.44x = 17,924.06 × 8,216.89
  4. Step 4: Simplify right side
    12,988.44x = 147,280,005.11
  5. Step 5: Solve for x
    x = 147,280,005.11/12,988.44
  6. Step 6: Final answer
    x = 11,339.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.