Home / 20,418.50-30,586.73-9,309.90

Finding the Fourth Proportional to 20,418.50, 30,586.73 and 9,309.90

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Solution

The fourth proportional to 20,418.50, 30,586.73 and 9,309.90 is: 13,946.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.50 : 30,586.73 = 9,309.90 : x
  2. Step 2: Convert to fraction form
    20,418.50/30,586.73 = 9,309.90/x
  3. Step 3: Cross multiply
    20,418.50x = 30,586.73 × 9,309.90
  4. Step 4: Simplify right side
    20,418.50x = 284,759,397.63
  5. Step 5: Solve for x
    x = 284,759,397.63/20,418.50
  6. Step 6: Final answer
    x = 13,946.15

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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.