Home / 21,374.05-29,497.31-12,878.84

Finding the Fourth Proportional to 21,374.05, 29,497.31 and 12,878.84

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Solution

The fourth proportional to 21,374.05, 29,497.31 and 12,878.84 is: 17,773.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,374.05 : 29,497.31 = 12,878.84 : x
  2. Step 2: Convert to fraction form
    21,374.05/29,497.31 = 12,878.84/x
  3. Step 3: Cross multiply
    21,374.05x = 29,497.31 × 12,878.84
  4. Step 4: Simplify right side
    21,374.05x = 379,891,135.92
  5. Step 5: Solve for x
    x = 379,891,135.92/21,374.05
  6. Step 6: Final answer
    x = 17,773.47

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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.