Home / 15,890.05-21,929.31-9,175.96

Finding the Fourth Proportional to 15,890.05, 21,929.31 and 9,175.96

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Solution

The fourth proportional to 15,890.05, 21,929.31 and 9,175.96 is: 12,663.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.05 : 21,929.31 = 9,175.96 : x
  2. Step 2: Convert to fraction form
    15,890.05/21,929.31 = 9,175.96/x
  3. Step 3: Cross multiply
    15,890.05x = 21,929.31 × 9,175.96
  4. Step 4: Simplify right side
    15,890.05x = 201,222,382.15
  5. Step 5: Solve for x
    x = 201,222,382.15/15,890.05
  6. Step 6: Final answer
    x = 12,663.42

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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.