Home / 20,718.45-28,590.57-11,287.08

Finding the Fourth Proportional to 20,718.45, 28,590.57 and 11,287.08

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Solution

The fourth proportional to 20,718.45, 28,590.57 and 11,287.08 is: 15,575.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.45 : 28,590.57 = 11,287.08 : x
  2. Step 2: Convert to fraction form
    20,718.45/28,590.57 = 11,287.08/x
  3. Step 3: Cross multiply
    20,718.45x = 28,590.57 × 11,287.08
  4. Step 4: Simplify right side
    20,718.45x = 322,704,050.84
  5. Step 5: Solve for x
    x = 322,704,050.84/20,718.45
  6. Step 6: Final answer
    x = 15,575.68

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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.