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Finding the Fourth Proportional to 19,187,969.67, 28,778,801.09 and 6,889,387.01

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Solution

The fourth proportional to 19,187,969.67, 28,778,801.09 and 6,889,387.01 is: 10,332,948.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,187,969.67 : 28,778,801.09 = 6,889,387.01 : x
  2. Step 2: Convert to fraction form
    19,187,969.67/28,778,801.09 = 6,889,387.01/x
  3. Step 3: Cross multiply
    19,187,969.67x = 28,778,801.09 × 6,889,387.01
  4. Step 4: Simplify right side
    19,187,969.67x = 198,268,298,214,478.91
  5. Step 5: Solve for x
    x = 198,268,298,214,478.91/19,187,969.67
  6. Step 6: Final answer
    x = 10,332,948.28

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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.