Home / 21,215.58-29,274.24-12,261.35

Finding the Fourth Proportional to 21,215.58, 29,274.24 and 12,261.35

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Solution

The fourth proportional to 21,215.58, 29,274.24 and 12,261.35 is: 16,918.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.58 : 29,274.24 = 12,261.35 : x
  2. Step 2: Convert to fraction form
    21,215.58/29,274.24 = 12,261.35/x
  3. Step 3: Cross multiply
    21,215.58x = 29,274.24 × 12,261.35
  4. Step 4: Simplify right side
    21,215.58x = 358,941,702.62
  5. Step 5: Solve for x
    x = 358,941,702.62/21,215.58
  6. Step 6: Final answer
    x = 16,918.78

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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.