Home / 20,782.74-31,181.40-10,782.69

Finding the Fourth Proportional to 20,782.74, 31,181.40 and 10,782.69

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Solution

The fourth proportional to 20,782.74, 31,181.40 and 10,782.69 is: 16,177.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.74 : 31,181.40 = 10,782.69 : x
  2. Step 2: Convert to fraction form
    20,782.74/31,181.40 = 10,782.69/x
  3. Step 3: Cross multiply
    20,782.74x = 31,181.40 × 10,782.69
  4. Step 4: Simplify right side
    20,782.74x = 336,219,369.97
  5. Step 5: Solve for x
    x = 336,219,369.97/20,782.74
  6. Step 6: Final answer
    x = 16,177.82

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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.