Home / 21,642.72-29,867.16-12,690.48

Finding the Fourth Proportional to 21,642.72, 29,867.16 and 12,690.48

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Solution

The fourth proportional to 21,642.72, 29,867.16 and 12,690.48 is: 17,512.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,642.72 : 29,867.16 = 12,690.48 : x
  2. Step 2: Convert to fraction form
    21,642.72/29,867.16 = 12,690.48/x
  3. Step 3: Cross multiply
    21,642.72x = 29,867.16 × 12,690.48
  4. Step 4: Simplify right side
    21,642.72x = 379,028,596.64
  5. Step 5: Solve for x
    x = 379,028,596.64/21,642.72
  6. Step 6: Final answer
    x = 17,512.98

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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.