Home / 20,384.90-28,131.45-12,317.44

Finding the Fourth Proportional to 20,384.90, 28,131.45 and 12,317.44

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Solution

The fourth proportional to 20,384.90, 28,131.45 and 12,317.44 is: 16,998.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.90 : 28,131.45 = 12,317.44 : x
  2. Step 2: Convert to fraction form
    20,384.90/28,131.45 = 12,317.44/x
  3. Step 3: Cross multiply
    20,384.90x = 28,131.45 × 12,317.44
  4. Step 4: Simplify right side
    20,384.90x = 346,507,377.16
  5. Step 5: Solve for x
    x = 346,507,377.16/20,384.90
  6. Step 6: Final answer
    x = 16,998.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.