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Finding the Fourth Proportional to 7,021,403.40, 9,843,235.80 and 7,021,403.40

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Solution

The fourth proportional to 7,021,403.40, 9,843,235.80 and 7,021,403.40 is: 9,843,235.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021,403.40 : 9,843,235.80 = 7,021,403.40 : x
  2. Step 2: Convert to fraction form
    7,021,403.40/9,843,235.80 = 7,021,403.40/x
  3. Step 3: Cross multiply
    7,021,403.40x = 9,843,235.80 × 7,021,403.40
  4. Step 4: Simplify right side
    7,021,403.40x = 69,113,329,313,121.73
  5. Step 5: Solve for x
    x = 69,113,329,313,121.73/7,021,403.40
  6. Step 6: Final answer
    x = 9,843,235.80

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.