Home / 21,031.74-31,504.68-13,108.32

Finding the Fourth Proportional to 21,031.74, 31,504.68 and 13,108.32

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Solution

The fourth proportional to 21,031.74, 31,504.68 and 13,108.32 is: 19,635.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.74 : 31,504.68 = 13,108.32 : x
  2. Step 2: Convert to fraction form
    21,031.74/31,504.68 = 13,108.32/x
  3. Step 3: Cross multiply
    21,031.74x = 31,504.68 × 13,108.32
  4. Step 4: Simplify right side
    21,031.74x = 412,973,426.94
  5. Step 5: Solve for x
    x = 412,973,426.94/21,031.74
  6. Step 6: Final answer
    x = 19,635.72

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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.