Home / 20,329.90-30,437.34-12,916

Finding the Fourth Proportional to 20,329.90, 30,437.34 and 12,916

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Solution

The fourth proportional to 20,329.90, 30,437.34 and 12,916 is: 19,337.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,329.90 : 30,437.34 = 12,916 : x
  2. Step 2: Convert to fraction form
    20,329.90/30,437.34 = 12,916/x
  3. Step 3: Cross multiply
    20,329.90x = 30,437.34 × 12,916
  4. Step 4: Simplify right side
    20,329.90x = 393,128,683.44
  5. Step 5: Solve for x
    x = 393,128,683.44/20,329.90
  6. Step 6: Final answer
    x = 19,337.46

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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.