Home / 21,190.16-31,795.50-8,719.40

Finding the Fourth Proportional to 21,190.16, 31,795.50 and 8,719.40

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Solution

The fourth proportional to 21,190.16, 31,795.50 and 8,719.40 is: 13,083.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.16 : 31,795.50 = 8,719.40 : x
  2. Step 2: Convert to fraction form
    21,190.16/31,795.50 = 8,719.40/x
  3. Step 3: Cross multiply
    21,190.16x = 31,795.50 × 8,719.40
  4. Step 4: Simplify right side
    21,190.16x = 277,237,682.70
  5. Step 5: Solve for x
    x = 277,237,682.70/21,190.16
  6. Step 6: Final answer
    x = 13,083.32

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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.