Home / 21,087.42-29,099.80-11,655.78

Finding the Fourth Proportional to 21,087.42, 29,099.80 and 11,655.78

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Solution

The fourth proportional to 21,087.42, 29,099.80 and 11,655.78 is: 16,084.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.42 : 29,099.80 = 11,655.78 : x
  2. Step 2: Convert to fraction form
    21,087.42/29,099.80 = 11,655.78/x
  3. Step 3: Cross multiply
    21,087.42x = 29,099.80 × 11,655.78
  4. Step 4: Simplify right side
    21,087.42x = 339,180,866.84
  5. Step 5: Solve for x
    x = 339,180,866.84/21,087.42
  6. Step 6: Final answer
    x = 16,084.51

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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.