Home / 18,908.91-28,364.31-13,386.96

Finding the Fourth Proportional to 18,908.91, 28,364.31 and 13,386.96

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Solution

The fourth proportional to 18,908.91, 28,364.31 and 13,386.96 is: 20,081.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,908.91 : 28,364.31 = 13,386.96 : x
  2. Step 2: Convert to fraction form
    18,908.91/28,364.31 = 13,386.96/x
  3. Step 3: Cross multiply
    18,908.91x = 28,364.31 × 13,386.96
  4. Step 4: Simplify right side
    18,908.91x = 379,711,883.40
  5. Step 5: Solve for x
    x = 379,711,883.40/18,908.91
  6. Step 6: Final answer
    x = 20,081.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.