Home / 28,015.06-38,660.79-15,439.81

Finding the Fourth Proportional to 28,015.06, 38,660.79 and 15,439.81

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Solution

The fourth proportional to 28,015.06, 38,660.79 and 15,439.81 is: 21,306.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,015.06 : 38,660.79 = 15,439.81 : x
  2. Step 2: Convert to fraction form
    28,015.06/38,660.79 = 15,439.81/x
  3. Step 3: Cross multiply
    28,015.06x = 38,660.79 × 15,439.81
  4. Step 4: Simplify right side
    28,015.06x = 596,915,252.05
  5. Step 5: Solve for x
    x = 596,915,252.05/28,015.06
  6. Step 6: Final answer
    x = 21,306.94

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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.