Home / 21,261.69-29,338.47-12,309.03

Finding the Fourth Proportional to 21,261.69, 29,338.47 and 12,309.03

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Solution

The fourth proportional to 21,261.69, 29,338.47 and 12,309.03 is: 16,984.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,261.69 : 29,338.47 = 12,309.03 : x
  2. Step 2: Convert to fraction form
    21,261.69/29,338.47 = 12,309.03/x
  3. Step 3: Cross multiply
    21,261.69x = 29,338.47 × 12,309.03
  4. Step 4: Simplify right side
    21,261.69x = 361,128,107.38
  5. Step 5: Solve for x
    x = 361,128,107.38/21,261.69
  6. Step 6: Final answer
    x = 16,984.92

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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.