Home / 21,600.90-29,808.54-13,217.40

Finding the Fourth Proportional to 21,600.90, 29,808.54 and 13,217.40

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Solution

The fourth proportional to 21,600.90, 29,808.54 and 13,217.40 is: 18,239.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,600.90 : 29,808.54 = 13,217.40 : x
  2. Step 2: Convert to fraction form
    21,600.90/29,808.54 = 13,217.40/x
  3. Step 3: Cross multiply
    21,600.90x = 29,808.54 × 13,217.40
  4. Step 4: Simplify right side
    21,600.90x = 393,991,396.60
  5. Step 5: Solve for x
    x = 393,991,396.60/21,600.90
  6. Step 6: Final answer
    x = 18,239.58

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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.