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Finding the Fourth Proportional to 20,562.58, 30,695 and 18,071.47

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Solution

The fourth proportional to 20,562.58, 30,695 and 18,071.47 is: 26,976.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562.58 : 30,695 = 18,071.47 : x
  2. Step 2: Convert to fraction form
    20,562.58/30,695 = 18,071.47/x
  3. Step 3: Cross multiply
    20,562.58x = 30,695 × 18,071.47
  4. Step 4: Simplify right side
    20,562.58x = 554,703,771.65
  5. Step 5: Solve for x
    x = 554,703,771.65/20,562.58
  6. Step 6: Final answer
    x = 26,976.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.