Home / 28,286.84-39,034.80-15,712.40

Finding the Fourth Proportional to 28,286.84, 39,034.80 and 15,712.40

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Solution

The fourth proportional to 28,286.84, 39,034.80 and 15,712.40 is: 21,682.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,286.84 : 39,034.80 = 15,712.40 : x
  2. Step 2: Convert to fraction form
    28,286.84/39,034.80 = 15,712.40/x
  3. Step 3: Cross multiply
    28,286.84x = 39,034.80 × 15,712.40
  4. Step 4: Simplify right side
    28,286.84x = 613,330,391.52
  5. Step 5: Solve for x
    x = 613,330,391.52/28,286.84
  6. Step 6: Final answer
    x = 21,682.53

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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.