Home / 21,289.42-29,380.32-11,857.98

Finding the Fourth Proportional to 21,289.42, 29,380.32 and 11,857.98

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Solution

The fourth proportional to 21,289.42, 29,380.32 and 11,857.98 is: 16,364.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.42 : 29,380.32 = 11,857.98 : x
  2. Step 2: Convert to fraction form
    21,289.42/29,380.32 = 11,857.98/x
  3. Step 3: Cross multiply
    21,289.42x = 29,380.32 × 11,857.98
  4. Step 4: Simplify right side
    21,289.42x = 348,391,246.95
  5. Step 5: Solve for x
    x = 348,391,246.95/21,289.42
  6. Step 6: Final answer
    x = 16,364.53

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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.