Home / 12,656.21-17,470.23-7,620.68

Finding the Fourth Proportional to 12,656.21, 17,470.23 and 7,620.68

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Solution

The fourth proportional to 12,656.21, 17,470.23 and 7,620.68 is: 10,519.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.21 : 17,470.23 = 7,620.68 : x
  2. Step 2: Convert to fraction form
    12,656.21/17,470.23 = 7,620.68/x
  3. Step 3: Cross multiply
    12,656.21x = 17,470.23 × 7,620.68
  4. Step 4: Simplify right side
    12,656.21x = 133,135,032.36
  5. Step 5: Solve for x
    x = 133,135,032.36/12,656.21
  6. Step 6: Final answer
    x = 10,519.34

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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.