Home / 21,661.16-32,450.28-12,869.36

Finding the Fourth Proportional to 21,661.16, 32,450.28 and 12,869.36

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Solution

The fourth proportional to 21,661.16, 32,450.28 and 12,869.36 is: 19,279.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.16 : 32,450.28 = 12,869.36 : x
  2. Step 2: Convert to fraction form
    21,661.16/32,450.28 = 12,869.36/x
  3. Step 3: Cross multiply
    21,661.16x = 32,450.28 × 12,869.36
  4. Step 4: Simplify right side
    21,661.16x = 417,614,335.42
  5. Step 5: Solve for x
    x = 417,614,335.42/21,661.16
  6. Step 6: Final answer
    x = 19,279.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.