Home / 28,409.12-39,206.28-15,833.84

Finding the Fourth Proportional to 28,409.12, 39,206.28 and 15,833.84

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Solution

The fourth proportional to 28,409.12, 39,206.28 and 15,833.84 is: 21,851.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.12 : 39,206.28 = 15,833.84 : x
  2. Step 2: Convert to fraction form
    28,409.12/39,206.28 = 15,833.84/x
  3. Step 3: Cross multiply
    28,409.12x = 39,206.28 × 15,833.84
  4. Step 4: Simplify right side
    28,409.12x = 620,785,964.52
  5. Step 5: Solve for x
    x = 620,785,964.52/28,409.12
  6. Step 6: Final answer
    x = 21,851.64

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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.