Home / 21,451.75-32,190.60-9,139.75

Finding the Fourth Proportional to 21,451.75, 32,190.60 and 9,139.75

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Solution

The fourth proportional to 21,451.75, 32,190.60 and 9,139.75 is: 13,715.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,451.75 : 32,190.60 = 9,139.75 : x
  2. Step 2: Convert to fraction form
    21,451.75/32,190.60 = 9,139.75/x
  3. Step 3: Cross multiply
    21,451.75x = 32,190.60 × 9,139.75
  4. Step 4: Simplify right side
    21,451.75x = 294,214,036.35
  5. Step 5: Solve for x
    x = 294,214,036.35/21,451.75
  6. Step 6: Final answer
    x = 13,715.15

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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.