Home / 28,554.12-39,406.50-15,979.80

Finding the Fourth Proportional to 28,554.12, 39,406.50 and 15,979.80

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Solution

The fourth proportional to 28,554.12, 39,406.50 and 15,979.80 is: 22,053.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,554.12 : 39,406.50 = 15,979.80 : x
  2. Step 2: Convert to fraction form
    28,554.12/39,406.50 = 15,979.80/x
  3. Step 3: Cross multiply
    28,554.12x = 39,406.50 × 15,979.80
  4. Step 4: Simplify right side
    28,554.12x = 629,707,988.70
  5. Step 5: Solve for x
    x = 629,707,988.70/28,554.12
  6. Step 6: Final answer
    x = 22,053.14

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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.