Home / 20,963.72-31,585.55-18,964.73

Finding the Fourth Proportional to 20,963.72, 31,585.55 and 18,964.73

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Solution

The fourth proportional to 20,963.72, 31,585.55 and 18,964.73 is: 28,573.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.72 : 31,585.55 = 18,964.73 : x
  2. Step 2: Convert to fraction form
    20,963.72/31,585.55 = 18,964.73/x
  3. Step 3: Cross multiply
    20,963.72x = 31,585.55 × 18,964.73
  4. Step 4: Simplify right side
    20,963.72x = 599,011,427.65
  5. Step 5: Solve for x
    x = 599,011,427.65/20,963.72
  6. Step 6: Final answer
    x = 28,573.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.