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Finding the Fourth Proportional to 9,621.40, 14,388.90 and 8,066.20

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Solution

The fourth proportional to 9,621.40, 14,388.90 and 8,066.20 is: 12,063.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,621.40 : 14,388.90 = 8,066.20 : x
  2. Step 2: Convert to fraction form
    9,621.40/14,388.90 = 8,066.20/x
  3. Step 3: Cross multiply
    9,621.40x = 14,388.90 × 8,066.20
  4. Step 4: Simplify right side
    9,621.40x = 116,063,745.18
  5. Step 5: Solve for x
    x = 116,063,745.18/9,621.40
  6. Step 6: Final answer
    x = 12,063.08

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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.