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Finding the Fourth Proportional to 13,814.80, 20,706.14 and 7,895.84

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Solution

The fourth proportional to 13,814.80, 20,706.14 and 7,895.84 is: 11,834.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,814.80 : 20,706.14 = 7,895.84 : x
  2. Step 2: Convert to fraction form
    13,814.80/20,706.14 = 7,895.84/x
  3. Step 3: Cross multiply
    13,814.80x = 20,706.14 × 7,895.84
  4. Step 4: Simplify right side
    13,814.80x = 163,492,284.67
  5. Step 5: Solve for x
    x = 163,492,284.67/13,814.80
  6. Step 6: Final answer
    x = 11,834.58

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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.