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Finding the Fourth Proportional to 19,110.60, 28,665.90 and 18,851.40

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Solution

The fourth proportional to 19,110.60, 28,665.90 and 18,851.40 is: 28,277.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,110.60 : 28,665.90 = 18,851.40 : x
  2. Step 2: Convert to fraction form
    19,110.60/28,665.90 = 18,851.40/x
  3. Step 3: Cross multiply
    19,110.60x = 28,665.90 × 18,851.40
  4. Step 4: Simplify right side
    19,110.60x = 540,392,347.26
  5. Step 5: Solve for x
    x = 540,392,347.26/19,110.60
  6. Step 6: Final answer
    x = 28,277.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.