Home / 20,979.65-31,458.64-6,186.69

Finding the Fourth Proportional to 20,979.65, 31,458.64 and 6,186.69

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Solution

The fourth proportional to 20,979.65, 31,458.64 and 6,186.69 is: 9,276.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.65 : 31,458.64 = 6,186.69 : x
  2. Step 2: Convert to fraction form
    20,979.65/31,458.64 = 6,186.69/x
  3. Step 3: Cross multiply
    20,979.65x = 31,458.64 × 6,186.69
  4. Step 4: Simplify right side
    20,979.65x = 194,624,853.50
  5. Step 5: Solve for x
    x = 194,624,853.50/20,979.65
  6. Step 6: Final answer
    x = 9,276.84

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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.