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Finding the Fourth Proportional to 13,205.88, 18,221.13 and 8,957.52

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Solution

The fourth proportional to 13,205.88, 18,221.13 and 8,957.52 is: 12,359.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,205.88 : 18,221.13 = 8,957.52 : x
  2. Step 2: Convert to fraction form
    13,205.88/18,221.13 = 8,957.52/x
  3. Step 3: Cross multiply
    13,205.88x = 18,221.13 × 8,957.52
  4. Step 4: Simplify right side
    13,205.88x = 163,216,136.40
  5. Step 5: Solve for x
    x = 163,216,136.40/13,205.88
  6. Step 6: Final answer
    x = 12,359.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.