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Finding the Fourth Proportional to 15,907.16, 21,959.14 and 9,942.68

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Solution

The fourth proportional to 15,907.16, 21,959.14 and 9,942.68 is: 13,725.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,907.16 : 21,959.14 = 9,942.68 : x
  2. Step 2: Convert to fraction form
    15,907.16/21,959.14 = 9,942.68/x
  3. Step 3: Cross multiply
    15,907.16x = 21,959.14 × 9,942.68
  4. Step 4: Simplify right side
    15,907.16x = 218,332,702.10
  5. Step 5: Solve for x
    x = 218,332,702.10/15,907.16
  6. Step 6: Final answer
    x = 13,725.44

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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.