Home / 21,215.98-29,274.78-12,261.74

Finding the Fourth Proportional to 21,215.98, 29,274.78 and 12,261.74

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Solution

The fourth proportional to 21,215.98, 29,274.78 and 12,261.74 is: 16,919.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.98 : 29,274.78 = 12,261.74 : x
  2. Step 2: Convert to fraction form
    21,215.98/29,274.78 = 12,261.74/x
  3. Step 3: Cross multiply
    21,215.98x = 29,274.78 × 12,261.74
  4. Step 4: Simplify right side
    21,215.98x = 358,959,740.92
  5. Step 5: Solve for x
    x = 358,959,740.92/21,215.98
  6. Step 6: Final answer
    x = 16,919.31

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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.