Home / 20,728.93-31,097.82-6,689.76

Finding the Fourth Proportional to 20,728.93, 31,097.82 and 6,689.76

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Solution

The fourth proportional to 20,728.93, 31,097.82 and 6,689.76 is: 10,036.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.93 : 31,097.82 = 6,689.76 : x
  2. Step 2: Convert to fraction form
    20,728.93/31,097.82 = 6,689.76/x
  3. Step 3: Cross multiply
    20,728.93x = 31,097.82 × 6,689.76
  4. Step 4: Simplify right side
    20,728.93x = 208,036,860.79
  5. Step 5: Solve for x
    x = 208,036,860.79/20,728.93
  6. Step 6: Final answer
    x = 10,036.06

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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.