Home / 15,871.20-21,920.94-10,556.52

Finding the Fourth Proportional to 15,871.20, 21,920.94 and 10,556.52

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Solution

The fourth proportional to 15,871.20, 21,920.94 and 10,556.52 is: 14,580.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,871.20 : 21,920.94 = 10,556.52 : x
  2. Step 2: Convert to fraction form
    15,871.20/21,920.94 = 10,556.52/x
  3. Step 3: Cross multiply
    15,871.20x = 21,920.94 × 10,556.52
  4. Step 4: Simplify right side
    15,871.20x = 231,408,841.53
  5. Step 5: Solve for x
    x = 231,408,841.53/15,871.20
  6. Step 6: Final answer
    x = 14,580.43

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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.