Home / 20,907.09-28,865.30-12,957.75

Finding the Fourth Proportional to 20,907.09, 28,865.30 and 12,957.75

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Solution

The fourth proportional to 20,907.09, 28,865.30 and 12,957.75 is: 17,890.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.09 : 28,865.30 = 12,957.75 : x
  2. Step 2: Convert to fraction form
    20,907.09/28,865.30 = 12,957.75/x
  3. Step 3: Cross multiply
    20,907.09x = 28,865.30 × 12,957.75
  4. Step 4: Simplify right side
    20,907.09x = 374,029,341.08
  5. Step 5: Solve for x
    x = 374,029,341.08/20,907.09
  6. Step 6: Final answer
    x = 17,890.07

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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.