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Finding the Fourth Proportional to 9,355.80, 12,911.04 and 5,164.04

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Solution

The fourth proportional to 9,355.80, 12,911.04 and 5,164.04 is: 7,126.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,355.80 : 12,911.04 = 5,164.04 : x
  2. Step 2: Convert to fraction form
    9,355.80/12,911.04 = 5,164.04/x
  3. Step 3: Cross multiply
    9,355.80x = 12,911.04 × 5,164.04
  4. Step 4: Simplify right side
    9,355.80x = 66,673,127.00
  5. Step 5: Solve for x
    x = 66,673,127.00/9,355.80
  6. Step 6: Final answer
    x = 7,126.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.