Home / 20,681.80-28,539.42-11,250.16

Finding the Fourth Proportional to 20,681.80, 28,539.42 and 11,250.16

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Solution

The fourth proportional to 20,681.80, 28,539.42 and 11,250.16 is: 15,524.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.80 : 28,539.42 = 11,250.16 : x
  2. Step 2: Convert to fraction form
    20,681.80/28,539.42 = 11,250.16/x
  3. Step 3: Cross multiply
    20,681.80x = 28,539.42 × 11,250.16
  4. Step 4: Simplify right side
    20,681.80x = 321,073,041.31
  5. Step 5: Solve for x
    x = 321,073,041.31/20,681.80
  6. Step 6: Final answer
    x = 15,524.42

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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.