Home / 21,489.13-32,220.73-9,640.75

Finding the Fourth Proportional to 21,489.13, 32,220.73 and 9,640.75

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Solution

The fourth proportional to 21,489.13, 32,220.73 and 9,640.75 is: 14,455.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.13 : 32,220.73 = 9,640.75 : x
  2. Step 2: Convert to fraction form
    21,489.13/32,220.73 = 9,640.75/x
  3. Step 3: Cross multiply
    21,489.13x = 32,220.73 × 9,640.75
  4. Step 4: Simplify right side
    21,489.13x = 310,632,002.75
  5. Step 5: Solve for x
    x = 310,632,002.75/21,489.13
  6. Step 6: Final answer
    x = 14,455.31

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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.