Home / 15,286.17-21,095.14-8,912.59

Finding the Fourth Proportional to 15,286.17, 21,095.14 and 8,912.59

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Solution

The fourth proportional to 15,286.17, 21,095.14 and 8,912.59 is: 12,299.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,286.17 : 21,095.14 = 8,912.59 : x
  2. Step 2: Convert to fraction form
    15,286.17/21,095.14 = 8,912.59/x
  3. Step 3: Cross multiply
    15,286.17x = 21,095.14 × 8,912.59
  4. Step 4: Simplify right side
    15,286.17x = 188,012,258.79
  5. Step 5: Solve for x
    x = 188,012,258.79/15,286.17
  6. Step 6: Final answer
    x = 12,299.50

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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.