Home / 20,739.40-28,620.30-11,307.96

Finding the Fourth Proportional to 20,739.40, 28,620.30 and 11,307.96

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Solution

The fourth proportional to 20,739.40, 28,620.30 and 11,307.96 is: 15,604.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.40 : 28,620.30 = 11,307.96 : x
  2. Step 2: Convert to fraction form
    20,739.40/28,620.30 = 11,307.96/x
  3. Step 3: Cross multiply
    20,739.40x = 28,620.30 × 11,307.96
  4. Step 4: Simplify right side
    20,739.40x = 323,637,207.59
  5. Step 5: Solve for x
    x = 323,637,207.59/20,739.40
  6. Step 6: Final answer
    x = 15,604.95

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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.