Home / 21,215.13-29,276.10-11,784.30

Finding the Fourth Proportional to 21,215.13, 29,276.10 and 11,784.30

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Solution

The fourth proportional to 21,215.13, 29,276.10 and 11,784.30 is: 16,261.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.13 : 29,276.10 = 11,784.30 : x
  2. Step 2: Convert to fraction form
    21,215.13/29,276.10 = 11,784.30/x
  3. Step 3: Cross multiply
    21,215.13x = 29,276.10 × 11,784.30
  4. Step 4: Simplify right side
    21,215.13x = 344,998,345.23
  5. Step 5: Solve for x
    x = 344,998,345.23/21,215.13
  6. Step 6: Final answer
    x = 16,261.90

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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.