Home / 21,388.16-29,516.78-12,892.97

Finding the Fourth Proportional to 21,388.16, 29,516.78 and 12,892.97

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Solution

The fourth proportional to 21,388.16, 29,516.78 and 12,892.97 is: 17,792.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.16 : 29,516.78 = 12,892.97 : x
  2. Step 2: Convert to fraction form
    21,388.16/29,516.78 = 12,892.97/x
  3. Step 3: Cross multiply
    21,388.16x = 29,516.78 × 12,892.97
  4. Step 4: Simplify right side
    21,388.16x = 380,558,968.36
  5. Step 5: Solve for x
    x = 380,558,968.36/21,388.16
  6. Step 6: Final answer
    x = 17,792.98

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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.