Home / 21,215.03-29,275.74-11,784.20

Finding the Fourth Proportional to 21,215.03, 29,275.74 and 11,784.20

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Solution

The fourth proportional to 21,215.03, 29,275.74 and 11,784.20 is: 16,261.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.03 : 29,275.74 = 11,784.20 : x
  2. Step 2: Convert to fraction form
    21,215.03/29,275.74 = 11,784.20/x
  3. Step 3: Cross multiply
    21,215.03x = 29,275.74 × 11,784.20
  4. Step 4: Simplify right side
    21,215.03x = 344,991,028.93
  5. Step 5: Solve for x
    x = 344,991,028.93/21,215.03
  6. Step 6: Final answer
    x = 16,261.64

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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.