Home / 21,489.15-32,220.80-9,640.74

Finding the Fourth Proportional to 21,489.15, 32,220.80 and 9,640.74

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Solution

The fourth proportional to 21,489.15, 32,220.80 and 9,640.74 is: 14,455.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.15 : 32,220.80 = 9,640.74 : x
  2. Step 2: Convert to fraction form
    21,489.15/32,220.80 = 9,640.74/x
  3. Step 3: Cross multiply
    21,489.15x = 32,220.80 × 9,640.74
  4. Step 4: Simplify right side
    21,489.15x = 310,632,355.39
  5. Step 5: Solve for x
    x = 310,632,355.39/21,489.15
  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.