Home / 20,681.58-28,539.75-11,250.15

Finding the Fourth Proportional to 20,681.58, 28,539.75 and 11,250.15

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Solution

The fourth proportional to 20,681.58, 28,539.75 and 11,250.15 is: 15,524.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.58 : 28,539.75 = 11,250.15 : x
  2. Step 2: Convert to fraction form
    20,681.58/28,539.75 = 11,250.15/x
  3. Step 3: Cross multiply
    20,681.58x = 28,539.75 × 11,250.15
  4. Step 4: Simplify right side
    20,681.58x = 321,076,468.46
  5. Step 5: Solve for x
    x = 321,076,468.46/20,681.58
  6. Step 6: Final answer
    x = 15,524.76

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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.