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Finding the Fourth Proportional to 14,690.87, 20,265.88 and 9,380.10

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Solution

The fourth proportional to 14,690.87, 20,265.88 and 9,380.10 is: 12,939.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,690.87 : 20,265.88 = 9,380.10 : x
  2. Step 2: Convert to fraction form
    14,690.87/20,265.88 = 9,380.10/x
  3. Step 3: Cross multiply
    14,690.87x = 20,265.88 × 9,380.10
  4. Step 4: Simplify right side
    14,690.87x = 190,095,980.99
  5. Step 5: Solve for x
    x = 190,095,980.99/14,690.87
  6. Step 6: Final answer
    x = 12,939.74

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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.