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Finding the Fourth Proportional to 15,909.12, 21,953.97 and 8,835.99

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Solution

The fourth proportional to 15,909.12, 21,953.97 and 8,835.99 is: 12,193.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,909.12 : 21,953.97 = 8,835.99 : x
  2. Step 2: Convert to fraction form
    15,909.12/21,953.97 = 8,835.99/x
  3. Step 3: Cross multiply
    15,909.12x = 21,953.97 × 8,835.99
  4. Step 4: Simplify right side
    15,909.12x = 193,985,059.38
  5. Step 5: Solve for x
    x = 193,985,059.38/15,909.12
  6. Step 6: Final answer
    x = 12,193.32

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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.