Home / 21,116.34-29,140.38-11,685.42

Finding the Fourth Proportional to 21,116.34, 29,140.38 and 11,685.42

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Solution

The fourth proportional to 21,116.34, 29,140.38 and 11,685.42 is: 16,125.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.34 : 29,140.38 = 11,685.42 : x
  2. Step 2: Convert to fraction form
    21,116.34/29,140.38 = 11,685.42/x
  3. Step 3: Cross multiply
    21,116.34x = 29,140.38 × 11,685.42
  4. Step 4: Simplify right side
    21,116.34x = 340,517,579.26
  5. Step 5: Solve for x
    x = 340,517,579.26/21,116.34
  6. Step 6: Final answer
    x = 16,125.79

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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.