Home / 28,071.87-38,739.89-15,971.69

Finding the Fourth Proportional to 28,071.87, 38,739.89 and 15,971.69

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Solution

The fourth proportional to 28,071.87, 38,739.89 and 15,971.69 is: 22,041.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,071.87 : 38,739.89 = 15,971.69 : x
  2. Step 2: Convert to fraction form
    28,071.87/38,739.89 = 15,971.69/x
  3. Step 3: Cross multiply
    28,071.87x = 38,739.89 × 15,971.69
  4. Step 4: Simplify right side
    28,071.87x = 618,741,416.86
  5. Step 5: Solve for x
    x = 618,741,416.86/28,071.87
  6. Step 6: Final answer
    x = 22,041.33

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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.