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Finding the Fourth Proportional to 19,551.21, 26,980.55 and 11,053.32

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Solution

The fourth proportional to 19,551.21, 26,980.55 and 11,053.32 is: 15,253.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,551.21 : 26,980.55 = 11,053.32 : x
  2. Step 2: Convert to fraction form
    19,551.21/26,980.55 = 11,053.32/x
  3. Step 3: Cross multiply
    19,551.21x = 26,980.55 × 11,053.32
  4. Step 4: Simplify right side
    19,551.21x = 298,224,597.66
  5. Step 5: Solve for x
    x = 298,224,597.66/19,551.21
  6. Step 6: Final answer
    x = 15,253.51

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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.