Home / 28,318.08-39,078.72-15,743.04

Finding the Fourth Proportional to 28,318.08, 39,078.72 and 15,743.04

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Solution

The fourth proportional to 28,318.08, 39,078.72 and 15,743.04 is: 21,725.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.08 : 39,078.72 = 15,743.04 : x
  2. Step 2: Convert to fraction form
    28,318.08/39,078.72 = 15,743.04/x
  3. Step 3: Cross multiply
    28,318.08x = 39,078.72 × 15,743.04
  4. Step 4: Simplify right side
    28,318.08x = 615,217,852.11
  5. Step 5: Solve for x
    x = 615,217,852.11/28,318.08
  6. Step 6: Final answer
    x = 21,725.27

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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.