Home / 21,346.49-29,455.43-11,915.45

Finding the Fourth Proportional to 21,346.49, 29,455.43 and 11,915.45

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Solution

The fourth proportional to 21,346.49, 29,455.43 and 11,915.45 is: 16,441.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,346.49 : 29,455.43 = 11,915.45 : x
  2. Step 2: Convert to fraction form
    21,346.49/29,455.43 = 11,915.45/x
  3. Step 3: Cross multiply
    21,346.49x = 29,455.43 × 11,915.45
  4. Step 4: Simplify right side
    21,346.49x = 350,974,703.39
  5. Step 5: Solve for x
    x = 350,974,703.39/21,346.49
  6. Step 6: Final answer
    x = 16,441.80

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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.