Home / 21,207.76-31,811.62-11,973.76

Finding the Fourth Proportional to 21,207.76, 31,811.62 and 11,973.76

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Solution

The fourth proportional to 21,207.76, 31,811.62 and 11,973.76 is: 17,960.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.76 : 31,811.62 = 11,973.76 : x
  2. Step 2: Convert to fraction form
    21,207.76/31,811.62 = 11,973.76/x
  3. Step 3: Cross multiply
    21,207.76x = 31,811.62 × 11,973.76
  4. Step 4: Simplify right side
    21,207.76x = 380,904,703.09
  5. Step 5: Solve for x
    x = 380,904,703.09/21,207.76
  6. Step 6: Final answer
    x = 17,960.63

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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.