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Finding the Fourth Proportional to 18,235.26, 27,341.94 and 7,128.72

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Solution

The fourth proportional to 18,235.26, 27,341.94 and 7,128.72 is: 10,688.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,235.26 : 27,341.94 = 7,128.72 : x
  2. Step 2: Convert to fraction form
    18,235.26/27,341.94 = 7,128.72/x
  3. Step 3: Cross multiply
    18,235.26x = 27,341.94 × 7,128.72
  4. Step 4: Simplify right side
    18,235.26x = 194,913,034.52
  5. Step 5: Solve for x
    x = 194,913,034.52/18,235.26
  6. Step 6: Final answer
    x = 10,688.80

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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.