Home / 21,239.51-29,311.16-12,289.82

Finding the Fourth Proportional to 21,239.51, 29,311.16 and 12,289.82

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Solution

The fourth proportional to 21,239.51, 29,311.16 and 12,289.82 is: 16,960.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.51 : 29,311.16 = 12,289.82 : x
  2. Step 2: Convert to fraction form
    21,239.51/29,311.16 = 12,289.82/x
  3. Step 3: Cross multiply
    21,239.51x = 29,311.16 × 12,289.82
  4. Step 4: Simplify right side
    21,239.51x = 360,228,672.39
  5. Step 5: Solve for x
    x = 360,228,672.39/21,239.51
  6. Step 6: Final answer
    x = 16,960.31

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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.