Home / 20,488.65-30,727.35-12,980.94

Finding the Fourth Proportional to 20,488.65, 30,727.35 and 12,980.94

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Solution

The fourth proportional to 20,488.65, 30,727.35 and 12,980.94 is: 19,467.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.65 : 30,727.35 = 12,980.94 : x
  2. Step 2: Convert to fraction form
    20,488.65/30,727.35 = 12,980.94/x
  3. Step 3: Cross multiply
    20,488.65x = 30,727.35 × 12,980.94
  4. Step 4: Simplify right side
    20,488.65x = 398,869,886.71
  5. Step 5: Solve for x
    x = 398,869,886.71/20,488.65
  6. Step 6: Final answer
    x = 19,467.85

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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.