Home / 20,531.58-28,331.46-15,156.86

Finding the Fourth Proportional to 20,531.58, 28,331.46 and 15,156.86

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Solution

The fourth proportional to 20,531.58, 28,331.46 and 15,156.86 is: 20,914.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.58 : 28,331.46 = 15,156.86 : x
  2. Step 2: Convert to fraction form
    20,531.58/28,331.46 = 15,156.86/x
  3. Step 3: Cross multiply
    20,531.58x = 28,331.46 × 15,156.86
  4. Step 4: Simplify right side
    20,531.58x = 429,415,972.82
  5. Step 5: Solve for x
    x = 429,415,972.82/20,531.58
  6. Step 6: Final answer
    x = 20,914.90

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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.