Home / 20,900.40-28,842.15-11,825.66

Finding the Fourth Proportional to 20,900.40, 28,842.15 and 11,825.66

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Solution

The fourth proportional to 20,900.40, 28,842.15 and 11,825.66 is: 16,319.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.40 : 28,842.15 = 11,825.66 : x
  2. Step 2: Convert to fraction form
    20,900.40/28,842.15 = 11,825.66/x
  3. Step 3: Cross multiply
    20,900.40x = 28,842.15 × 11,825.66
  4. Step 4: Simplify right side
    20,900.40x = 341,077,576.02
  5. Step 5: Solve for x
    x = 341,077,576.02/20,900.40
  6. Step 6: Final answer
    x = 16,319.19

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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.