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Finding the Fourth Proportional to 19,353.61, 28,869.71 and 18,705.74

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Solution

The fourth proportional to 19,353.61, 28,869.71 and 18,705.74 is: 27,903.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,353.61 : 28,869.71 = 18,705.74 : x
  2. Step 2: Convert to fraction form
    19,353.61/28,869.71 = 18,705.74/x
  3. Step 3: Cross multiply
    19,353.61x = 28,869.71 × 18,705.74
  4. Step 4: Simplify right side
    19,353.61x = 540,029,289.14
  5. Step 5: Solve for x
    x = 540,029,289.14/19,353.61
  6. Step 6: Final answer
    x = 27,903.29

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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.