Home / 21,085.68-29,099.88-11,655.12

Finding the Fourth Proportional to 21,085.68, 29,099.88 and 11,655.12

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Solution

The fourth proportional to 21,085.68, 29,099.88 and 11,655.12 is: 16,084.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.68 : 29,099.88 = 11,655.12 : x
  2. Step 2: Convert to fraction form
    21,085.68/29,099.88 = 11,655.12/x
  3. Step 3: Cross multiply
    21,085.68x = 29,099.88 × 11,655.12
  4. Step 4: Simplify right side
    21,085.68x = 339,162,593.39
  5. Step 5: Solve for x
    x = 339,162,593.39/21,085.68
  6. Step 6: Final answer
    x = 16,084.97

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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.