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Finding the Fourth Proportional to 14,409.98, 19,885.98 and 8,122.34

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Solution

The fourth proportional to 14,409.98, 19,885.98 and 8,122.34 is: 11,208.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,409.98 : 19,885.98 = 8,122.34 : x
  2. Step 2: Convert to fraction form
    14,409.98/19,885.98 = 8,122.34/x
  3. Step 3: Cross multiply
    14,409.98x = 19,885.98 × 8,122.34
  4. Step 4: Simplify right side
    14,409.98x = 161,520,690.79
  5. Step 5: Solve for x
    x = 161,520,690.79/14,409.98
  6. Step 6: Final answer
    x = 11,208.95

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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.