Home / 20,690.86-28,554.03-11,260.06

Finding the Fourth Proportional to 20,690.86, 28,554.03 and 11,260.06

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Solution

The fourth proportional to 20,690.86, 28,554.03 and 11,260.06 is: 15,539.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.86 : 28,554.03 = 11,260.06 : x
  2. Step 2: Convert to fraction form
    20,690.86/28,554.03 = 11,260.06/x
  3. Step 3: Cross multiply
    20,690.86x = 28,554.03 × 11,260.06
  4. Step 4: Simplify right side
    20,690.86x = 321,520,091.04
  5. Step 5: Solve for x
    x = 321,520,091.04/20,690.86
  6. Step 6: Final answer
    x = 15,539.23

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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.