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Finding the Fourth Proportional to 19,987.26, 29,807.14 and 19,719.11

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Solution

The fourth proportional to 19,987.26, 29,807.14 and 19,719.11 is: 29,407.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.26 : 29,807.14 = 19,719.11 : x
  2. Step 2: Convert to fraction form
    19,987.26/29,807.14 = 19,719.11/x
  3. Step 3: Cross multiply
    19,987.26x = 29,807.14 × 19,719.11
  4. Step 4: Simplify right side
    19,987.26x = 587,770,334.64
  5. Step 5: Solve for x
    x = 587,770,334.64/19,987.26
  6. Step 6: Final answer
    x = 29,407.25

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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.