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Finding the Fourth Proportional to 9,228.90, 12,891.30 and 9,228.90

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Solution

The fourth proportional to 9,228.90, 12,891.30 and 9,228.90 is: 12,891.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,228.90 : 12,891.30 = 9,228.90 : x
  2. Step 2: Convert to fraction form
    9,228.90/12,891.30 = 9,228.90/x
  3. Step 3: Cross multiply
    9,228.90x = 12,891.30 × 9,228.90
  4. Step 4: Simplify right side
    9,228.90x = 118,972,518.57
  5. Step 5: Solve for x
    x = 118,972,518.57/9,228.90
  6. Step 6: Final answer
    x = 12,891.30

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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.