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Finding the Fourth Proportional to 8,821.40, 13,292.79 and 7,295.70

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Solution

The fourth proportional to 8,821.40, 13,292.79 and 7,295.70 is: 10,993.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,821.40 : 13,292.79 = 7,295.70 : x
  2. Step 2: Convert to fraction form
    8,821.40/13,292.79 = 7,295.70/x
  3. Step 3: Cross multiply
    8,821.40x = 13,292.79 × 7,295.70
  4. Step 4: Simplify right side
    8,821.40x = 96,980,208.00
  5. Step 5: Solve for x
    x = 96,980,208.00/8,821.40
  6. Step 6: Final answer
    x = 10,993.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.