Home / 20,639.16-28,482.60-12,141.84

Finding the Fourth Proportional to 20,639.16, 28,482.60 and 12,141.84

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Solution

The fourth proportional to 20,639.16, 28,482.60 and 12,141.84 is: 16,756.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.16 : 28,482.60 = 12,141.84 : x
  2. Step 2: Convert to fraction form
    20,639.16/28,482.60 = 12,141.84/x
  3. Step 3: Cross multiply
    20,639.16x = 28,482.60 × 12,141.84
  4. Step 4: Simplify right side
    20,639.16x = 345,831,171.98
  5. Step 5: Solve for x
    x = 345,831,171.98/20,639.16
  6. Step 6: Final answer
    x = 16,756.07

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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.