Home / 20,712.87-28,586.78-11,758.53

Finding the Fourth Proportional to 20,712.87, 28,586.78 and 11,758.53

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Solution

The fourth proportional to 20,712.87, 28,586.78 and 11,758.53 is: 16,228.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.87 : 28,586.78 = 11,758.53 : x
  2. Step 2: Convert to fraction form
    20,712.87/28,586.78 = 11,758.53/x
  3. Step 3: Cross multiply
    20,712.87x = 28,586.78 × 11,758.53
  4. Step 4: Simplify right side
    20,712.87x = 336,138,510.23
  5. Step 5: Solve for x
    x = 336,138,510.23/20,712.87
  6. Step 6: Final answer
    x = 16,228.49

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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.