Home / 28,290.96-39,041.82-15,715.68

Finding the Fourth Proportional to 28,290.96, 39,041.82 and 15,715.68

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Solution

The fourth proportional to 28,290.96, 39,041.82 and 15,715.68 is: 21,687.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.96 : 39,041.82 = 15,715.68 : x
  2. Step 2: Convert to fraction form
    28,290.96/39,041.82 = 15,715.68/x
  3. Step 3: Cross multiply
    28,290.96x = 39,041.82 × 15,715.68
  4. Step 4: Simplify right side
    28,290.96x = 613,568,749.74
  5. Step 5: Solve for x
    x = 613,568,749.74/28,290.96
  6. Step 6: Final answer
    x = 21,687.80

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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.