Home / 21,039.91-31,601.90-13,156.45

Finding the Fourth Proportional to 21,039.91, 31,601.90 and 13,156.45

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Solution

The fourth proportional to 21,039.91, 31,601.90 and 13,156.45 is: 19,760.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039.91 : 31,601.90 = 13,156.45 : x
  2. Step 2: Convert to fraction form
    21,039.91/31,601.90 = 13,156.45/x
  3. Step 3: Cross multiply
    21,039.91x = 31,601.90 × 13,156.45
  4. Step 4: Simplify right side
    21,039.91x = 415,768,817.26
  5. Step 5: Solve for x
    x = 415,768,817.26/21,039.91
  6. Step 6: Final answer
    x = 19,760.96

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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.