Home / 21,402.80-29,535-12,450.56

Finding the Fourth Proportional to 21,402.80, 29,535 and 12,450.56

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Solution

The fourth proportional to 21,402.80, 29,535 and 12,450.56 is: 17,181.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,402.80 : 29,535 = 12,450.56 : x
  2. Step 2: Convert to fraction form
    21,402.80/29,535 = 12,450.56/x
  3. Step 3: Cross multiply
    21,402.80x = 29,535 × 12,450.56
  4. Step 4: Simplify right side
    21,402.80x = 367,727,289.60
  5. Step 5: Solve for x
    x = 367,727,289.60/21,402.80
  6. Step 6: Final answer
    x = 17,181.27

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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.