Home / 21,173.76-31,785.60-12,415.36

Finding the Fourth Proportional to 21,173.76, 31,785.60 and 12,415.36

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Solution

The fourth proportional to 21,173.76, 31,785.60 and 12,415.36 is: 18,637.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,173.76 : 31,785.60 = 12,415.36 : x
  2. Step 2: Convert to fraction form
    21,173.76/31,785.60 = 12,415.36/x
  3. Step 3: Cross multiply
    21,173.76x = 31,785.60 × 12,415.36
  4. Step 4: Simplify right side
    21,173.76x = 394,629,666.82
  5. Step 5: Solve for x
    x = 394,629,666.82/21,173.76
  6. Step 6: Final answer
    x = 18,637.68

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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.