Home / 15,744.80-21,730.20-11,961.76

Finding the Fourth Proportional to 15,744.80, 21,730.20 and 11,961.76

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Solution

The fourth proportional to 15,744.80, 21,730.20 and 11,961.76 is: 16,509.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,744.80 : 21,730.20 = 11,961.76 : x
  2. Step 2: Convert to fraction form
    15,744.80/21,730.20 = 11,961.76/x
  3. Step 3: Cross multiply
    15,744.80x = 21,730.20 × 11,961.76
  4. Step 4: Simplify right side
    15,744.80x = 259,931,437.15
  5. Step 5: Solve for x
    x = 259,931,437.15/15,744.80
  6. Step 6: Final answer
    x = 16,509.03

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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.