Home / 15,308.06-21,116.21-9,993.65

Finding the Fourth Proportional to 15,308.06, 21,116.21 and 9,993.65

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Solution

The fourth proportional to 15,308.06, 21,116.21 and 9,993.65 is: 13,785.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,308.06 : 21,116.21 = 9,993.65 : x
  2. Step 2: Convert to fraction form
    15,308.06/21,116.21 = 9,993.65/x
  3. Step 3: Cross multiply
    15,308.06x = 21,116.21 × 9,993.65
  4. Step 4: Simplify right side
    15,308.06x = 211,027,856.52
  5. Step 5: Solve for x
    x = 211,027,856.52/15,308.06
  6. Step 6: Final answer
    x = 13,785.41

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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.