Home / 21,748.88-30,031.84-13,805.20

Finding the Fourth Proportional to 21,748.88, 30,031.84 and 13,805.20

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Solution

The fourth proportional to 21,748.88, 30,031.84 and 13,805.20 is: 19,062.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,748.88 : 30,031.84 = 13,805.20 : x
  2. Step 2: Convert to fraction form
    21,748.88/30,031.84 = 13,805.20/x
  3. Step 3: Cross multiply
    21,748.88x = 30,031.84 × 13,805.20
  4. Step 4: Simplify right side
    21,748.88x = 414,595,557.57
  5. Step 5: Solve for x
    x = 414,595,557.57/21,748.88
  6. Step 6: Final answer
    x = 19,062.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.