Home / 21,078.13-29,087.76-11,646.63

Finding the Fourth Proportional to 21,078.13, 29,087.76 and 11,646.63

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Solution

The fourth proportional to 21,078.13, 29,087.76 and 11,646.63 is: 16,072.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.13 : 29,087.76 = 11,646.63 : x
  2. Step 2: Convert to fraction form
    21,078.13/29,087.76 = 11,646.63/x
  3. Step 3: Cross multiply
    21,078.13x = 29,087.76 × 11,646.63
  4. Step 4: Simplify right side
    21,078.13x = 338,774,378.25
  5. Step 5: Solve for x
    x = 338,774,378.25/21,078.13
  6. Step 6: Final answer
    x = 16,072.32

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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.