Home / 21,656.12-29,885.54-12,703.79

Finding the Fourth Proportional to 21,656.12, 29,885.54 and 12,703.79

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Solution

The fourth proportional to 21,656.12, 29,885.54 and 12,703.79 is: 17,531.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.12 : 29,885.54 = 12,703.79 : x
  2. Step 2: Convert to fraction form
    21,656.12/29,885.54 = 12,703.79/x
  3. Step 3: Cross multiply
    21,656.12x = 29,885.54 × 12,703.79
  4. Step 4: Simplify right side
    21,656.12x = 379,659,635.39
  5. Step 5: Solve for x
    x = 379,659,635.39/21,656.12
  6. Step 6: Final answer
    x = 17,531.29

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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.