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Finding the Fourth Proportional to 21,667.32, 29,900.90 and 11,731.32

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Solution

The fourth proportional to 21,667.32, 29,900.90 and 11,731.32 is: 16,189.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,667.32 : 29,900.90 = 11,731.32 : x
  2. Step 2: Convert to fraction form
    21,667.32/29,900.90 = 11,731.32/x
  3. Step 3: Cross multiply
    21,667.32x = 29,900.90 × 11,731.32
  4. Step 4: Simplify right side
    21,667.32x = 350,776,967.53
  5. Step 5: Solve for x
    x = 350,776,967.53/21,667.32
  6. Step 6: Final answer
    x = 16,189.22

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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.