Home / 20,269.90-30,355.43-11,478.16

Finding the Fourth Proportional to 20,269.90, 30,355.43 and 11,478.16

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Solution

The fourth proportional to 20,269.90, 30,355.43 and 11,478.16 is: 17,189.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,269.90 : 30,355.43 = 11,478.16 : x
  2. Step 2: Convert to fraction form
    20,269.90/30,355.43 = 11,478.16/x
  3. Step 3: Cross multiply
    20,269.90x = 30,355.43 × 11,478.16
  4. Step 4: Simplify right side
    20,269.90x = 348,424,330.63
  5. Step 5: Solve for x
    x = 348,424,330.63/20,269.90
  6. Step 6: Final answer
    x = 17,189.25

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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.