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Finding the Fourth Proportional to 21,912.35, 32,921.04 and 14,030.28

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Solution

The fourth proportional to 21,912.35, 32,921.04 and 14,030.28 is: 21,079.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.35 : 32,921.04 = 14,030.28 : x
  2. Step 2: Convert to fraction form
    21,912.35/32,921.04 = 14,030.28/x
  3. Step 3: Cross multiply
    21,912.35x = 32,921.04 × 14,030.28
  4. Step 4: Simplify right side
    21,912.35x = 461,891,409.09
  5. Step 5: Solve for x
    x = 461,891,409.09/21,912.35
  6. Step 6: Final answer
    x = 21,079.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.