Home / 20,671.40-28,528.50-11,719.32

Finding the Fourth Proportional to 20,671.40, 28,528.50 and 11,719.32

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Solution

The fourth proportional to 20,671.40, 28,528.50 and 11,719.32 is: 16,173.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,671.40 : 28,528.50 = 11,719.32 : x
  2. Step 2: Convert to fraction form
    20,671.40/28,528.50 = 11,719.32/x
  3. Step 3: Cross multiply
    20,671.40x = 28,528.50 × 11,719.32
  4. Step 4: Simplify right side
    20,671.40x = 334,334,620.62
  5. Step 5: Solve for x
    x = 334,334,620.62/20,671.40
  6. Step 6: Final answer
    x = 16,173.78

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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.