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Finding the Fourth Proportional to 9,305.40, 12,998.40 and 9,305.40

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Solution

The fourth proportional to 9,305.40, 12,998.40 and 9,305.40 is: 12,998.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,305.40 : 12,998.40 = 9,305.40 : x
  2. Step 2: Convert to fraction form
    9,305.40/12,998.40 = 9,305.40/x
  3. Step 3: Cross multiply
    9,305.40x = 12,998.40 × 9,305.40
  4. Step 4: Simplify right side
    9,305.40x = 120,955,311.36
  5. Step 5: Solve for x
    x = 120,955,311.36/9,305.40
  6. Step 6: Final answer
    x = 12,998.40

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Half scale
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Double scale
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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.