Home / 21,102.08-31,637.39-12,780.27

Finding the Fourth Proportional to 21,102.08, 31,637.39 and 12,780.27

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Solution

The fourth proportional to 21,102.08, 31,637.39 and 12,780.27 is: 19,160.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.08 : 31,637.39 = 12,780.27 : x
  2. Step 2: Convert to fraction form
    21,102.08/31,637.39 = 12,780.27/x
  3. Step 3: Cross multiply
    21,102.08x = 31,637.39 × 12,780.27
  4. Step 4: Simplify right side
    21,102.08x = 404,334,322.39
  5. Step 5: Solve for x
    x = 404,334,322.39/21,102.08
  6. Step 6: Final answer
    x = 19,160.88

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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.