Home / 20,802.38-31,211.42-12,488.19

Finding the Fourth Proportional to 20,802.38, 31,211.42 and 12,488.19

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Solution

The fourth proportional to 20,802.38, 31,211.42 and 12,488.19 is: 18,736.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.38 : 31,211.42 = 12,488.19 : x
  2. Step 2: Convert to fraction form
    20,802.38/31,211.42 = 12,488.19/x
  3. Step 3: Cross multiply
    20,802.38x = 31,211.42 × 12,488.19
  4. Step 4: Simplify right side
    20,802.38x = 389,773,963.65
  5. Step 5: Solve for x
    x = 389,773,963.65/20,802.38
  6. Step 6: Final answer
    x = 18,736.99

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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.