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Finding the Fourth Proportional to 15,082,526.50, 20,813,711.61 and 8,206,890.10

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Solution

The fourth proportional to 15,082,526.50, 20,813,711.61 and 8,206,890.10 is: 11,325,413.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,082,526.50 : 20,813,711.61 = 8,206,890.10 : x
  2. Step 2: Convert to fraction form
    15,082,526.50/20,813,711.61 = 8,206,890.10/x
  3. Step 3: Cross multiply
    15,082,526.50x = 20,813,711.61 × 8,206,890.10
  4. Step 4: Simplify right side
    15,082,526.50x = 170,815,843,756,364.06
  5. Step 5: Solve for x
    x = 170,815,843,756,364.06/15,082,526.50
  6. Step 6: Final answer
    x = 11,325,413.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.