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Finding the Fourth Proportional to 18,903,356.80, 28,355,035.20 and 8,806,998.40

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Solution

The fourth proportional to 18,903,356.80, 28,355,035.20 and 8,806,998.40 is: 13,210,497.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903,356.80 : 28,355,035.20 = 8,806,998.40 : x
  2. Step 2: Convert to fraction form
    18,903,356.80/28,355,035.20 = 8,806,998.40/x
  3. Step 3: Cross multiply
    18,903,356.80x = 28,355,035.20 × 8,806,998.40
  4. Step 4: Simplify right side
    18,903,356.80x = 249,722,749,638,343.69
  5. Step 5: Solve for x
    x = 249,722,749,638,343.69/18,903,356.80
  6. Step 6: Final answer
    x = 13,210,497.60

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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.