Home / 21,656.90-29,886.96-12,223.64

Finding the Fourth Proportional to 21,656.90, 29,886.96 and 12,223.64

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Solution

The fourth proportional to 21,656.90, 29,886.96 and 12,223.64 is: 16,868.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.90 : 29,886.96 = 12,223.64 : x
  2. Step 2: Convert to fraction form
    21,656.90/29,886.96 = 12,223.64/x
  3. Step 3: Cross multiply
    21,656.90x = 29,886.96 × 12,223.64
  4. Step 4: Simplify right side
    21,656.90x = 365,327,290.30
  5. Step 5: Solve for x
    x = 365,327,290.30/21,656.90
  6. Step 6: Final answer
    x = 16,868.87

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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.