Home / 21,239.88-29,312.10-11,808.24

Finding the Fourth Proportional to 21,239.88, 29,312.10 and 11,808.24

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Solution

The fourth proportional to 21,239.88, 29,312.10 and 11,808.24 is: 16,295.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.88 : 29,312.10 = 11,808.24 : x
  2. Step 2: Convert to fraction form
    21,239.88/29,312.10 = 11,808.24/x
  3. Step 3: Cross multiply
    21,239.88x = 29,312.10 × 11,808.24
  4. Step 4: Simplify right side
    21,239.88x = 346,124,311.70
  5. Step 5: Solve for x
    x = 346,124,311.70/21,239.88
  6. Step 6: Final answer
    x = 16,295.96

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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.