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Finding the Fourth Proportional to 19,184.80, 28,820.40 and 18,666.40

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Solution

The fourth proportional to 19,184.80, 28,820.40 and 18,666.40 is: 28,041.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,184.80 : 28,820.40 = 18,666.40 : x
  2. Step 2: Convert to fraction form
    19,184.80/28,820.40 = 18,666.40/x
  3. Step 3: Cross multiply
    19,184.80x = 28,820.40 × 18,666.40
  4. Step 4: Simplify right side
    19,184.80x = 537,973,114.56
  5. Step 5: Solve for x
    x = 537,973,114.56/19,184.80
  6. Step 6: Final answer
    x = 28,041.63

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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.