Home / 15,286.76-21,100.23-9,982.40

Finding the Fourth Proportional to 15,286.76, 21,100.23 and 9,982.40

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Solution

The fourth proportional to 15,286.76, 21,100.23 and 9,982.40 is: 13,778.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,286.76 : 21,100.23 = 9,982.40 : x
  2. Step 2: Convert to fraction form
    15,286.76/21,100.23 = 9,982.40/x
  3. Step 3: Cross multiply
    15,286.76x = 21,100.23 × 9,982.40
  4. Step 4: Simplify right side
    15,286.76x = 210,630,935.95
  5. Step 5: Solve for x
    x = 210,630,935.95/15,286.76
  6. Step 6: Final answer
    x = 13,778.65

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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.