Home / 19,991.18-27,576.78-12,438.74

Finding the Fourth Proportional to 19,991.18, 27,576.78 and 12,438.74

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Solution

The fourth proportional to 19,991.18, 27,576.78 and 12,438.74 is: 17,158.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.18 : 27,576.78 = 12,438.74 : x
  2. Step 2: Convert to fraction form
    19,991.18/27,576.78 = 12,438.74/x
  3. Step 3: Cross multiply
    19,991.18x = 27,576.78 × 12,438.74
  4. Step 4: Simplify right side
    19,991.18x = 343,020,396.46
  5. Step 5: Solve for x
    x = 343,020,396.46/19,991.18
  6. Step 6: Final answer
    x = 17,158.59

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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.