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Finding the Fourth Proportional to 18,809.46, 28,197.54 and 7,130.88

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Solution

The fourth proportional to 18,809.46, 28,197.54 and 7,130.88 is: 10,690.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.46 : 28,197.54 = 7,130.88 : x
  2. Step 2: Convert to fraction form
    18,809.46/28,197.54 = 7,130.88/x
  3. Step 3: Cross multiply
    18,809.46x = 28,197.54 × 7,130.88
  4. Step 4: Simplify right side
    18,809.46x = 201,073,274.04
  5. Step 5: Solve for x
    x = 201,073,274.04/18,809.46
  6. Step 6: Final answer
    x = 10,690.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.