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Finding the Fourth Proportional to 19,341.90, 28,813.10 and 18,881.10

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Solution

The fourth proportional to 19,341.90, 28,813.10 and 18,881.10 is: 28,126.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,341.90 : 28,813.10 = 18,881.10 : x
  2. Step 2: Convert to fraction form
    19,341.90/28,813.10 = 18,881.10/x
  3. Step 3: Cross multiply
    19,341.90x = 28,813.10 × 18,881.10
  4. Step 4: Simplify right side
    19,341.90x = 544,022,928.00
  5. Step 5: Solve for x
    x = 544,022,928.00/19,341.90
  6. Step 6: Final answer
    x = 28,126.65

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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.