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Finding the Fourth Proportional to 15,706.80, 21,675.72 and 8,633.34

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Solution

The fourth proportional to 15,706.80, 21,675.72 and 8,633.34 is: 11,914.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,706.80 : 21,675.72 = 8,633.34 : x
  2. Step 2: Convert to fraction form
    15,706.80/21,675.72 = 8,633.34/x
  3. Step 3: Cross multiply
    15,706.80x = 21,675.72 × 8,633.34
  4. Step 4: Simplify right side
    15,706.80x = 187,133,860.50
  5. Step 5: Solve for x
    x = 187,133,860.50/15,706.80
  6. Step 6: Final answer
    x = 11,914.19

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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.