Home / 20,342.68-28,071.75-11,390.03

Finding the Fourth Proportional to 20,342.68, 28,071.75 and 11,390.03

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Solution

The fourth proportional to 20,342.68, 28,071.75 and 11,390.03 is: 15,717.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.68 : 28,071.75 = 11,390.03 : x
  2. Step 2: Convert to fraction form
    20,342.68/28,071.75 = 11,390.03/x
  3. Step 3: Cross multiply
    20,342.68x = 28,071.75 × 11,390.03
  4. Step 4: Simplify right side
    20,342.68x = 319,738,074.65
  5. Step 5: Solve for x
    x = 319,738,074.65/20,342.68
  6. Step 6: Final answer
    x = 15,717.60

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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.