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Finding the Fourth Proportional to 14,976.16, 20,668.08 and 8,689.12

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Solution

The fourth proportional to 14,976.16, 20,668.08 and 8,689.12 is: 11,991.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,976.16 : 20,668.08 = 8,689.12 : x
  2. Step 2: Convert to fraction form
    14,976.16/20,668.08 = 8,689.12/x
  3. Step 3: Cross multiply
    14,976.16x = 20,668.08 × 8,689.12
  4. Step 4: Simplify right side
    14,976.16x = 179,587,427.29
  5. Step 5: Solve for x
    x = 179,587,427.29/14,976.16
  6. Step 6: Final answer
    x = 11,991.55

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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.