Home / 21,188.12-31,801.22-11,814.40

Finding the Fourth Proportional to 21,188.12, 31,801.22 and 11,814.40

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Solution

The fourth proportional to 21,188.12, 31,801.22 and 11,814.40 is: 17,732.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.12 : 31,801.22 = 11,814.40 : x
  2. Step 2: Convert to fraction form
    21,188.12/31,801.22 = 11,814.40/x
  3. Step 3: Cross multiply
    21,188.12x = 31,801.22 × 11,814.40
  4. Step 4: Simplify right side
    21,188.12x = 375,712,115.49
  5. Step 5: Solve for x
    x = 375,712,115.49/21,188.12
  6. Step 6: Final answer
    x = 17,732.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.