Home / 21,029.58-31,523.09-13,638.74

Finding the Fourth Proportional to 21,029.58, 31,523.09 and 13,638.74

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Solution

The fourth proportional to 21,029.58, 31,523.09 and 13,638.74 is: 20,444.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,029.58 : 31,523.09 = 13,638.74 : x
  2. Step 2: Convert to fraction form
    21,029.58/31,523.09 = 13,638.74/x
  3. Step 3: Cross multiply
    21,029.58x = 31,523.09 × 13,638.74
  4. Step 4: Simplify right side
    21,029.58x = 429,935,002.70
  5. Step 5: Solve for x
    x = 429,935,002.70/21,029.58
  6. Step 6: Final answer
    x = 20,444.30

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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.