Home / 19,890.62-27,443.44-12,821.13

Finding the Fourth Proportional to 19,890.62, 27,443.44 and 12,821.13

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Solution

The fourth proportional to 19,890.62, 27,443.44 and 12,821.13 is: 17,689.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.62 : 27,443.44 = 12,821.13 : x
  2. Step 2: Convert to fraction form
    19,890.62/27,443.44 = 12,821.13/x
  3. Step 3: Cross multiply
    19,890.62x = 27,443.44 × 12,821.13
  4. Step 4: Simplify right side
    19,890.62x = 351,855,911.89
  5. Step 5: Solve for x
    x = 351,855,911.89/19,890.62
  6. Step 6: Final answer
    x = 17,689.54

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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.