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Finding the Fourth Proportional to 18,693,115.20, 28,039,672.80 and 7,333,934.40

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Solution

The fourth proportional to 18,693,115.20, 28,039,672.80 and 7,333,934.40 is: 11,000,901.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693,115.20 : 28,039,672.80 = 7,333,934.40 : x
  2. Step 2: Convert to fraction form
    18,693,115.20/28,039,672.80 = 7,333,934.40/x
  3. Step 3: Cross multiply
    18,693,115.20x = 28,039,672.80 × 7,333,934.40
  4. Step 4: Simplify right side
    18,693,115.20x = 205,641,120,912,664.34
  5. Step 5: Solve for x
    x = 205,641,120,912,664.34/18,693,115.20
  6. Step 6: Final answer
    x = 11,000,901.60

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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.