Home / 21,415.75-32,136.60-9,103.75

Finding the Fourth Proportional to 21,415.75, 32,136.60 and 9,103.75

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Solution

The fourth proportional to 21,415.75, 32,136.60 and 9,103.75 is: 13,661.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.75 : 32,136.60 = 9,103.75 : x
  2. Step 2: Convert to fraction form
    21,415.75/32,136.60 = 9,103.75/x
  3. Step 3: Cross multiply
    21,415.75x = 32,136.60 × 9,103.75
  4. Step 4: Simplify right side
    21,415.75x = 292,563,572.25
  5. Step 5: Solve for x
    x = 292,563,572.25/21,415.75
  6. Step 6: Final answer
    x = 13,661.14

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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.