Home / 20,785.12-31,173.93-5,990.40

Finding the Fourth Proportional to 20,785.12, 31,173.93 and 5,990.40

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Solution

The fourth proportional to 20,785.12, 31,173.93 and 5,990.40 is: 8,984.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.12 : 31,173.93 = 5,990.40 : x
  2. Step 2: Convert to fraction form
    20,785.12/31,173.93 = 5,990.40/x
  3. Step 3: Cross multiply
    20,785.12x = 31,173.93 × 5,990.40
  4. Step 4: Simplify right side
    20,785.12x = 186,744,310.27
  5. Step 5: Solve for x
    x = 186,744,310.27/20,785.12
  6. Step 6: Final answer
    x = 8,984.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.