Home / 21,186.90-29,239.65-11,758.50

Finding the Fourth Proportional to 21,186.90, 29,239.65 and 11,758.50

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Solution

The fourth proportional to 21,186.90, 29,239.65 and 11,758.50 is: 16,227.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.90 : 29,239.65 = 11,758.50 : x
  2. Step 2: Convert to fraction form
    21,186.90/29,239.65 = 11,758.50/x
  3. Step 3: Cross multiply
    21,186.90x = 29,239.65 × 11,758.50
  4. Step 4: Simplify right side
    21,186.90x = 343,814,424.53
  5. Step 5: Solve for x
    x = 343,814,424.53/21,186.90
  6. Step 6: Final answer
    x = 16,227.69

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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.