Home / 21,678.16-29,837.96-15,379.60

Finding the Fourth Proportional to 21,678.16, 29,837.96 and 15,379.60

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Solution

The fourth proportional to 21,678.16, 29,837.96 and 15,379.60 is: 21,168.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,678.16 : 29,837.96 = 15,379.60 : x
  2. Step 2: Convert to fraction form
    21,678.16/29,837.96 = 15,379.60/x
  3. Step 3: Cross multiply
    21,678.16x = 29,837.96 × 15,379.60
  4. Step 4: Simplify right side
    21,678.16x = 458,895,889.62
  5. Step 5: Solve for x
    x = 458,895,889.62/21,678.16
  6. Step 6: Final answer
    x = 21,168.58

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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.