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Finding the Fourth Proportional to 19,693.80, 27,186.64 and 12,624.26

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Solution

The fourth proportional to 19,693.80, 27,186.64 and 12,624.26 is: 17,427.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,693.80 : 27,186.64 = 12,624.26 : x
  2. Step 2: Convert to fraction form
    19,693.80/27,186.64 = 12,624.26/x
  3. Step 3: Cross multiply
    19,693.80x = 27,186.64 × 12,624.26
  4. Step 4: Simplify right side
    19,693.80x = 343,211,044.39
  5. Step 5: Solve for x
    x = 343,211,044.39/19,693.80
  6. Step 6: Final answer
    x = 17,427.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.