Home / 21,140.42-31,704.30-13,254.92

Finding the Fourth Proportional to 21,140.42, 31,704.30 and 13,254.92

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Solution

The fourth proportional to 21,140.42, 31,704.30 and 13,254.92 is: 19,878.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.42 : 31,704.30 = 13,254.92 : x
  2. Step 2: Convert to fraction form
    21,140.42/31,704.30 = 13,254.92/x
  3. Step 3: Cross multiply
    21,140.42x = 31,704.30 × 13,254.92
  4. Step 4: Simplify right side
    21,140.42x = 420,237,914.03
  5. Step 5: Solve for x
    x = 420,237,914.03/21,140.42
  6. Step 6: Final answer
    x = 19,878.41

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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.