Home / 21,290.55-29,381.87-11,859.12

Finding the Fourth Proportional to 21,290.55, 29,381.87 and 11,859.12

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Solution

The fourth proportional to 21,290.55, 29,381.87 and 11,859.12 is: 16,366.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.55 : 29,381.87 = 11,859.12 : x
  2. Step 2: Convert to fraction form
    21,290.55/29,381.87 = 11,859.12/x
  3. Step 3: Cross multiply
    21,290.55x = 29,381.87 × 11,859.12
  4. Step 4: Simplify right side
    21,290.55x = 348,443,122.15
  5. Step 5: Solve for x
    x = 348,443,122.15/21,290.55
  6. Step 6: Final answer
    x = 16,366.09

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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.