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Finding the Fourth Proportional to 18,995.64, 28,493.46 and 5,146.68

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Solution

The fourth proportional to 18,995.64, 28,493.46 and 5,146.68 is: 7,720.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.64 : 28,493.46 = 5,146.68 : x
  2. Step 2: Convert to fraction form
    18,995.64/28,493.46 = 5,146.68/x
  3. Step 3: Cross multiply
    18,995.64x = 28,493.46 × 5,146.68
  4. Step 4: Simplify right side
    18,995.64x = 146,646,720.71
  5. Step 5: Solve for x
    x = 146,646,720.71/18,995.64
  6. Step 6: Final answer
    x = 7,720.02

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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.