Home / 21,656.22-29,885.75-12,703.87

Finding the Fourth Proportional to 21,656.22, 29,885.75 and 12,703.87

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Solution

The fourth proportional to 21,656.22, 29,885.75 and 12,703.87 is: 17,531.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.22 : 29,885.75 = 12,703.87 : x
  2. Step 2: Convert to fraction form
    21,656.22/29,885.75 = 12,703.87/x
  3. Step 3: Cross multiply
    21,656.22x = 29,885.75 × 12,703.87
  4. Step 4: Simplify right side
    21,656.22x = 379,664,682.85
  5. Step 5: Solve for x
    x = 379,664,682.85/21,656.22
  6. Step 6: Final answer
    x = 17,531.44

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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.