Home / 20,400.07-28,149.97-11,899.93

Finding the Fourth Proportional to 20,400.07, 28,149.97 and 11,899.93

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Solution

The fourth proportional to 20,400.07, 28,149.97 and 11,899.93 is: 16,420.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.07 : 28,149.97 = 11,899.93 : x
  2. Step 2: Convert to fraction form
    20,400.07/28,149.97 = 11,899.93/x
  3. Step 3: Cross multiply
    20,400.07x = 28,149.97 × 11,899.93
  4. Step 4: Simplify right side
    20,400.07x = 334,982,672.50
  5. Step 5: Solve for x
    x = 334,982,672.50/20,400.07
  6. Step 6: Final answer
    x = 16,420.66

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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.