Home / 21,140.43-29,176.65-12,187.77

Finding the Fourth Proportional to 21,140.43, 29,176.65 and 12,187.77

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Solution

The fourth proportional to 21,140.43, 29,176.65 and 12,187.77 is: 16,820.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.43 : 29,176.65 = 12,187.77 : x
  2. Step 2: Convert to fraction form
    21,140.43/29,176.65 = 12,187.77/x
  3. Step 3: Cross multiply
    21,140.43x = 29,176.65 × 12,187.77
  4. Step 4: Simplify right side
    21,140.43x = 355,598,299.57
  5. Step 5: Solve for x
    x = 355,598,299.57/21,140.43
  6. Step 6: Final answer
    x = 16,820.77

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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.