Home / 21,540.51-29,725.86-11,980.14

Finding the Fourth Proportional to 21,540.51, 29,725.86 and 11,980.14

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Solution

The fourth proportional to 21,540.51, 29,725.86 and 11,980.14 is: 16,532.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,540.51 : 29,725.86 = 11,980.14 : x
  2. Step 2: Convert to fraction form
    21,540.51/29,725.86 = 11,980.14/x
  3. Step 3: Cross multiply
    21,540.51x = 29,725.86 × 11,980.14
  4. Step 4: Simplify right side
    21,540.51x = 356,119,964.42
  5. Step 5: Solve for x
    x = 356,119,964.42/21,540.51
  6. Step 6: Final answer
    x = 16,532.57

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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.