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Finding the Fourth Proportional to 21,751.80, 32,603.40 and 12,396.30

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Solution

The fourth proportional to 21,751.80, 32,603.40 and 12,396.30 is: 18,580.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,751.80 : 32,603.40 = 12,396.30 : x
  2. Step 2: Convert to fraction form
    21,751.80/32,603.40 = 12,396.30/x
  3. Step 3: Cross multiply
    21,751.80x = 32,603.40 × 12,396.30
  4. Step 4: Simplify right side
    21,751.80x = 404,161,527.42
  5. Step 5: Solve for x
    x = 404,161,527.42/21,751.80
  6. Step 6: Final answer
    x = 18,580.60

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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.