Home / 13,120.99-18,113.57-8,345.73

Finding the Fourth Proportional to 13,120.99, 18,113.57 and 8,345.73

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Solution

The fourth proportional to 13,120.99, 18,113.57 and 8,345.73 is: 11,521.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.99 : 18,113.57 = 8,345.73 : x
  2. Step 2: Convert to fraction form
    13,120.99/18,113.57 = 8,345.73/x
  3. Step 3: Cross multiply
    13,120.99x = 18,113.57 × 8,345.73
  4. Step 4: Simplify right side
    13,120.99x = 151,171,068.99
  5. Step 5: Solve for x
    x = 151,171,068.99/13,120.99
  6. Step 6: Final answer
    x = 11,521.32

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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.