Home / 20,816.14-28,724.76-12,858.52

Finding the Fourth Proportional to 20,816.14, 28,724.76 and 12,858.52

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Solution

The fourth proportional to 20,816.14, 28,724.76 and 12,858.52 is: 17,743.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.14 : 28,724.76 = 12,858.52 : x
  2. Step 2: Convert to fraction form
    20,816.14/28,724.76 = 12,858.52/x
  3. Step 3: Cross multiply
    20,816.14x = 28,724.76 × 12,858.52
  4. Step 4: Simplify right side
    20,816.14x = 369,357,900.96
  5. Step 5: Solve for x
    x = 369,357,900.96/20,816.14
  6. Step 6: Final answer
    x = 17,743.82

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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.