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Finding the Fourth Proportional to 21,794.80, 32,661.01 and 12,415.45

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Solution

The fourth proportional to 21,794.80, 32,661.01 and 12,415.45 is: 18,605.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,794.80 : 32,661.01 = 12,415.45 : x
  2. Step 2: Convert to fraction form
    21,794.80/32,661.01 = 12,415.45/x
  3. Step 3: Cross multiply
    21,794.80x = 32,661.01 × 12,415.45
  4. Step 4: Simplify right side
    21,794.80x = 405,501,023.91
  5. Step 5: Solve for x
    x = 405,501,023.91/21,794.80
  6. Step 6: Final answer
    x = 18,605.40

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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.