Home / 20,580.20-28,405.32-11,632.88

Finding the Fourth Proportional to 20,580.20, 28,405.32 and 11,632.88

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Solution

The fourth proportional to 20,580.20, 28,405.32 and 11,632.88 is: 16,056.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.20 : 28,405.32 = 11,632.88 : x
  2. Step 2: Convert to fraction form
    20,580.20/28,405.32 = 11,632.88/x
  3. Step 3: Cross multiply
    20,580.20x = 28,405.32 × 11,632.88
  4. Step 4: Simplify right side
    20,580.20x = 330,435,678.92
  5. Step 5: Solve for x
    x = 330,435,678.92/20,580.20
  6. Step 6: Final answer
    x = 16,056.00

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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.