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Finding the Fourth Proportional to 19,888.64, 29,825.64 and 11,570.78

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Solution

The fourth proportional to 19,888.64, 29,825.64 and 11,570.78 is: 17,351.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,888.64 : 29,825.64 = 11,570.78 : x
  2. Step 2: Convert to fraction form
    19,888.64/29,825.64 = 11,570.78/x
  3. Step 3: Cross multiply
    19,888.64x = 29,825.64 × 11,570.78
  4. Step 4: Simplify right side
    19,888.64x = 345,105,918.80
  5. Step 5: Solve for x
    x = 345,105,918.80/19,888.64
  6. Step 6: Final answer
    x = 17,351.91

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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.