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Finding the Fourth Proportional to 18,858.81, 28,288.22 and 5,007.81

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Solution

The fourth proportional to 18,858.81, 28,288.22 and 5,007.81 is: 7,511.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.81 : 28,288.22 = 5,007.81 : x
  2. Step 2: Convert to fraction form
    18,858.81/28,288.22 = 5,007.81/x
  3. Step 3: Cross multiply
    18,858.81x = 28,288.22 × 5,007.81
  4. Step 4: Simplify right side
    18,858.81x = 141,662,031.00
  5. Step 5: Solve for x
    x = 141,662,031.00/18,858.81
  6. Step 6: Final answer
    x = 7,511.72

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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.