Home / 13,078.98-18,043.44-7,772.76

Finding the Fourth Proportional to 13,078.98, 18,043.44 and 7,772.76

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Solution

The fourth proportional to 13,078.98, 18,043.44 and 7,772.76 is: 10,723.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.98 : 18,043.44 = 7,772.76 : x
  2. Step 2: Convert to fraction form
    13,078.98/18,043.44 = 7,772.76/x
  3. Step 3: Cross multiply
    13,078.98x = 18,043.44 × 7,772.76
  4. Step 4: Simplify right side
    13,078.98x = 140,247,328.69
  5. Step 5: Solve for x
    x = 140,247,328.69/13,078.98
  6. Step 6: Final answer
    x = 10,723.11

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.