Home / 21,346.82-29,458.58-11,915.38

Finding the Fourth Proportional to 21,346.82, 29,458.58 and 11,915.38

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Solution

The fourth proportional to 21,346.82, 29,458.58 and 11,915.38 is: 16,443.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,346.82 : 29,458.58 = 11,915.38 : x
  2. Step 2: Convert to fraction form
    21,346.82/29,458.58 = 11,915.38/x
  3. Step 3: Cross multiply
    21,346.82x = 29,458.58 × 11,915.38
  4. Step 4: Simplify right side
    21,346.82x = 351,010,041.74
  5. Step 5: Solve for x
    x = 351,010,041.74/21,346.82
  6. Step 6: Final answer
    x = 16,443.20

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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.