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Finding the Fourth Proportional to 15,773.84, 21,771.70 and 9,485

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Solution

The fourth proportional to 15,773.84, 21,771.70 and 9,485 is: 13,091.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,773.84 : 21,771.70 = 9,485 : x
  2. Step 2: Convert to fraction form
    15,773.84/21,771.70 = 9,485/x
  3. Step 3: Cross multiply
    15,773.84x = 21,771.70 × 9,485
  4. Step 4: Simplify right side
    15,773.84x = 206,504,574.50
  5. Step 5: Solve for x
    x = 206,504,574.50/15,773.84
  6. Step 6: Final answer
    x = 13,091.59

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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.