Home / 28,357.70-39,131.32-16,421.80

Finding the Fourth Proportional to 28,357.70, 39,131.32 and 16,421.80

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Solution

The fourth proportional to 28,357.70, 39,131.32 and 16,421.80 is: 22,660.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.70 : 39,131.32 = 16,421.80 : x
  2. Step 2: Convert to fraction form
    28,357.70/39,131.32 = 16,421.80/x
  3. Step 3: Cross multiply
    28,357.70x = 39,131.32 × 16,421.80
  4. Step 4: Simplify right side
    28,357.70x = 642,606,710.78
  5. Step 5: Solve for x
    x = 642,606,710.78/28,357.70
  6. Step 6: Final answer
    x = 22,660.75

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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.