Home / 21,087.84-29,100.42-11,656.20

Finding the Fourth Proportional to 21,087.84, 29,100.42 and 11,656.20

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Solution

The fourth proportional to 21,087.84, 29,100.42 and 11,656.20 is: 16,085.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.84 : 29,100.42 = 11,656.20 : x
  2. Step 2: Convert to fraction form
    21,087.84/29,100.42 = 11,656.20/x
  3. Step 3: Cross multiply
    21,087.84x = 29,100.42 × 11,656.20
  4. Step 4: Simplify right side
    21,087.84x = 339,200,315.60
  5. Step 5: Solve for x
    x = 339,200,315.60/21,087.84
  6. Step 6: Final answer
    x = 16,085.11

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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.