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Finding the Fourth Proportional to 21,603.36, 32,392.04 and 8,461.92

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Solution

The fourth proportional to 21,603.36, 32,392.04 and 8,461.92 is: 12,687.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.36 : 32,392.04 = 8,461.92 : x
  2. Step 2: Convert to fraction form
    21,603.36/32,392.04 = 8,461.92/x
  3. Step 3: Cross multiply
    21,603.36x = 32,392.04 × 8,461.92
  4. Step 4: Simplify right side
    21,603.36x = 274,098,851.12
  5. Step 5: Solve for x
    x = 274,098,851.12/21,603.36
  6. Step 6: Final answer
    x = 12,687.79

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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.