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Finding the Fourth Proportional to 15,888.97, 21,929.97 and 9,175.69

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Solution

The fourth proportional to 15,888.97, 21,929.97 and 9,175.69 is: 12,664.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,888.97 : 21,929.97 = 9,175.69 : x
  2. Step 2: Convert to fraction form
    15,888.97/21,929.97 = 9,175.69/x
  3. Step 3: Cross multiply
    15,888.97x = 21,929.97 × 9,175.69
  4. Step 4: Simplify right side
    15,888.97x = 201,222,606.43
  5. Step 5: Solve for x
    x = 201,222,606.43/15,888.97
  6. Step 6: Final answer
    x = 12,664.30

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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.