Home / 28,986.80-39,999.88-16,412.40

Finding the Fourth Proportional to 28,986.80, 39,999.88 and 16,412.40

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Solution

The fourth proportional to 28,986.80, 39,999.88 and 16,412.40 is: 22,648.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,986.80 : 39,999.88 = 16,412.40 : x
  2. Step 2: Convert to fraction form
    28,986.80/39,999.88 = 16,412.40/x
  3. Step 3: Cross multiply
    28,986.80x = 39,999.88 × 16,412.40
  4. Step 4: Simplify right side
    28,986.80x = 656,494,030.51
  5. Step 5: Solve for x
    x = 656,494,030.51/28,986.80
  6. Step 6: Final answer
    x = 22,648.03

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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.