Home / 28,318.09-39,077.88-15,743.65

Finding the Fourth Proportional to 28,318.09, 39,077.88 and 15,743.65

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Solution

The fourth proportional to 28,318.09, 39,077.88 and 15,743.65 is: 21,725.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.09 : 39,077.88 = 15,743.65 : x
  2. Step 2: Convert to fraction form
    28,318.09/39,077.88 = 15,743.65/x
  3. Step 3: Cross multiply
    28,318.09x = 39,077.88 × 15,743.65
  4. Step 4: Simplify right side
    28,318.09x = 615,228,465.46
  5. Step 5: Solve for x
    x = 615,228,465.46/28,318.09
  6. Step 6: Final answer
    x = 21,725.63

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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.