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Finding the Fourth Proportional to 9,000.90, 12,609.90 and 9,000.90

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Solution

The fourth proportional to 9,000.90, 12,609.90 and 9,000.90 is: 12,609.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,000.90 : 12,609.90 = 9,000.90 : x
  2. Step 2: Convert to fraction form
    9,000.90/12,609.90 = 9,000.90/x
  3. Step 3: Cross multiply
    9,000.90x = 12,609.90 × 9,000.90
  4. Step 4: Simplify right side
    9,000.90x = 113,500,448.91
  5. Step 5: Solve for x
    x = 113,500,448.91/9,000.90
  6. Step 6: Final answer
    x = 12,609.90

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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.