Home / 13,257.77-18,288.77-8,220.35

Finding the Fourth Proportional to 13,257.77, 18,288.77 and 8,220.35

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Solution

The fourth proportional to 13,257.77, 18,288.77 and 8,220.35 is: 11,339.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,257.77 : 18,288.77 = 8,220.35 : x
  2. Step 2: Convert to fraction form
    13,257.77/18,288.77 = 8,220.35/x
  3. Step 3: Cross multiply
    13,257.77x = 18,288.77 × 8,220.35
  4. Step 4: Simplify right side
    13,257.77x = 150,340,049.37
  5. Step 5: Solve for x
    x = 150,340,049.37/13,257.77
  6. Step 6: Final answer
    x = 11,339.77

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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.