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Finding the Fourth Proportional to 14,987.82, 20,684.12 and 8,616.45

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Solution

The fourth proportional to 14,987.82, 20,684.12 and 8,616.45 is: 11,891.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987.82 : 20,684.12 = 8,616.45 : x
  2. Step 2: Convert to fraction form
    14,987.82/20,684.12 = 8,616.45/x
  3. Step 3: Cross multiply
    14,987.82x = 20,684.12 × 8,616.45
  4. Step 4: Simplify right side
    14,987.82x = 178,223,642.69
  5. Step 5: Solve for x
    x = 178,223,642.69/14,987.82
  6. Step 6: Final answer
    x = 11,891.23

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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.