Home / 20,585.37-28,406.34-12,087.87

Finding the Fourth Proportional to 20,585.37, 28,406.34 and 12,087.87

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Solution

The fourth proportional to 20,585.37, 28,406.34 and 12,087.87 is: 16,680.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.37 : 28,406.34 = 12,087.87 : x
  2. Step 2: Convert to fraction form
    20,585.37/28,406.34 = 12,087.87/x
  3. Step 3: Cross multiply
    20,585.37x = 28,406.34 × 12,087.87
  4. Step 4: Simplify right side
    20,585.37x = 343,372,145.10
  5. Step 5: Solve for x
    x = 343,372,145.10/20,585.37
  6. Step 6: Final answer
    x = 16,680.40

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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.