Home / 20,842.77-28,763.21-12,345.37

Finding the Fourth Proportional to 20,842.77, 28,763.21 and 12,345.37

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Solution

The fourth proportional to 20,842.77, 28,763.21 and 12,345.37 is: 17,036.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.77 : 28,763.21 = 12,345.37 : x
  2. Step 2: Convert to fraction form
    20,842.77/28,763.21 = 12,345.37/x
  3. Step 3: Cross multiply
    20,842.77x = 28,763.21 × 12,345.37
  4. Step 4: Simplify right side
    20,842.77x = 355,092,469.84
  5. Step 5: Solve for x
    x = 355,092,469.84/20,842.77
  6. Step 6: Final answer
    x = 17,036.72

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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.