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Finding the Fourth Proportional to 8,999.20, 13,513.20 and 6,090.40

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Solution

The fourth proportional to 8,999.20, 13,513.20 and 6,090.40 is: 9,145.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.20 : 13,513.20 = 6,090.40 : x
  2. Step 2: Convert to fraction form
    8,999.20/13,513.20 = 6,090.40/x
  3. Step 3: Cross multiply
    8,999.20x = 13,513.20 × 6,090.40
  4. Step 4: Simplify right side
    8,999.20x = 82,300,793.28
  5. Step 5: Solve for x
    x = 82,300,793.28/8,999.20
  6. Step 6: Final answer
    x = 9,145.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.