Home / 20,960.72-28,925.66-11,887.80

Finding the Fourth Proportional to 20,960.72, 28,925.66 and 11,887.80

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Solution

The fourth proportional to 20,960.72, 28,925.66 and 11,887.80 is: 16,405.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.72 : 28,925.66 = 11,887.80 : x
  2. Step 2: Convert to fraction form
    20,960.72/28,925.66 = 11,887.80/x
  3. Step 3: Cross multiply
    20,960.72x = 28,925.66 × 11,887.80
  4. Step 4: Simplify right side
    20,960.72x = 343,862,401.51
  5. Step 5: Solve for x
    x = 343,862,401.51/20,960.72
  6. Step 6: Final answer
    x = 16,405.09

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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.