Home / 21,022.04-29,135.64-20,628.38

Finding the Fourth Proportional to 21,022.04, 29,135.64 and 20,628.38

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Solution

The fourth proportional to 21,022.04, 29,135.64 and 20,628.38 is: 28,590.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.04 : 29,135.64 = 20,628.38 : x
  2. Step 2: Convert to fraction form
    21,022.04/29,135.64 = 20,628.38/x
  3. Step 3: Cross multiply
    21,022.04x = 29,135.64 × 20,628.38
  4. Step 4: Simplify right side
    21,022.04x = 601,021,053.46
  5. Step 5: Solve for x
    x = 601,021,053.46/21,022.04
  6. Step 6: Final answer
    x = 28,590.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.