Home / 12,407.28-17,121.96-6,818.40

Finding the Fourth Proportional to 12,407.28, 17,121.96 and 6,818.40

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Solution

The fourth proportional to 12,407.28, 17,121.96 and 6,818.40 is: 9,409.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,407.28 : 17,121.96 = 6,818.40 : x
  2. Step 2: Convert to fraction form
    12,407.28/17,121.96 = 6,818.40/x
  3. Step 3: Cross multiply
    12,407.28x = 17,121.96 × 6,818.40
  4. Step 4: Simplify right side
    12,407.28x = 116,744,372.06
  5. Step 5: Solve for x
    x = 116,744,372.06/12,407.28
  6. Step 6: Final answer
    x = 9,409.34

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Half scale
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Double scale
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Similar ratio
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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.