Home / 12,406.28-17,120.58-6,817.40

Finding the Fourth Proportional to 12,406.28, 17,120.58 and 6,817.40

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Solution

The fourth proportional to 12,406.28, 17,120.58 and 6,817.40 is: 9,407.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,406.28 : 17,120.58 = 6,817.40 : x
  2. Step 2: Convert to fraction form
    12,406.28/17,120.58 = 6,817.40/x
  3. Step 3: Cross multiply
    12,406.28x = 17,120.58 × 6,817.40
  4. Step 4: Simplify right side
    12,406.28x = 116,717,842.09
  5. Step 5: Solve for x
    x = 116,717,842.09/12,406.28
  6. Step 6: Final answer
    x = 9,407.96

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Half scale
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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.