Home / 15,388.95-21,235.48-8,676.23

Finding the Fourth Proportional to 15,388.95, 21,235.48 and 8,676.23

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Solution

The fourth proportional to 15,388.95, 21,235.48 and 8,676.23 is: 11,972.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,388.95 : 21,235.48 = 8,676.23 : x
  2. Step 2: Convert to fraction form
    15,388.95/21,235.48 = 8,676.23/x
  3. Step 3: Cross multiply
    15,388.95x = 21,235.48 × 8,676.23
  4. Step 4: Simplify right side
    15,388.95x = 184,243,949.03
  5. Step 5: Solve for x
    x = 184,243,949.03/15,388.95
  6. Step 6: Final answer
    x = 11,972.48

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Half scale
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Double scale
Find fourth proportional to 15,389.95, 21,236.86 and 8,677.23
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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.