Home / 20,190.18-27,861.06-12,636.19

Finding the Fourth Proportional to 20,190.18, 27,861.06 and 12,636.19

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Solution

The fourth proportional to 20,190.18, 27,861.06 and 12,636.19 is: 17,437.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.18 : 27,861.06 = 12,636.19 : x
  2. Step 2: Convert to fraction form
    20,190.18/27,861.06 = 12,636.19/x
  3. Step 3: Cross multiply
    20,190.18x = 27,861.06 × 12,636.19
  4. Step 4: Simplify right side
    20,190.18x = 352,057,647.76
  5. Step 5: Solve for x
    x = 352,057,647.76/20,190.18
  6. Step 6: Final answer
    x = 17,437.07

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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.