Home / 21,156.30-29,136.65-20,697.03

Finding the Fourth Proportional to 21,156.30, 29,136.65 and 20,697.03

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Solution

The fourth proportional to 21,156.30, 29,136.65 and 20,697.03 is: 28,504.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.30 : 29,136.65 = 20,697.03 : x
  2. Step 2: Convert to fraction form
    21,156.30/29,136.65 = 20,697.03/x
  3. Step 3: Cross multiply
    21,156.30x = 29,136.65 × 20,697.03
  4. Step 4: Simplify right side
    21,156.30x = 603,042,015.66
  5. Step 5: Solve for x
    x = 603,042,015.66/21,156.30
  6. Step 6: Final answer
    x = 28,504.13

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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.