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Finding the Fourth Proportional to 13,690.58, 18,901.14 and 8,983.08

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Solution

The fourth proportional to 13,690.58, 18,901.14 and 8,983.08 is: 12,401.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.58 : 18,901.14 = 8,983.08 : x
  2. Step 2: Convert to fraction form
    13,690.58/18,901.14 = 8,983.08/x
  3. Step 3: Cross multiply
    13,690.58x = 18,901.14 × 8,983.08
  4. Step 4: Simplify right side
    13,690.58x = 169,790,452.71
  5. Step 5: Solve for x
    x = 169,790,452.71/13,690.58
  6. Step 6: Final answer
    x = 12,401.99

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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.