Home / 28,115.92-38,799.93-15,540.67

Finding the Fourth Proportional to 28,115.92, 38,799.93 and 15,540.67

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Solution

The fourth proportional to 28,115.92, 38,799.93 and 15,540.67 is: 21,446.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.92 : 38,799.93 = 15,540.67 : x
  2. Step 2: Convert to fraction form
    28,115.92/38,799.93 = 15,540.67/x
  3. Step 3: Cross multiply
    28,115.92x = 38,799.93 × 15,540.67
  4. Step 4: Simplify right side
    28,115.92x = 602,976,908.15
  5. Step 5: Solve for x
    x = 602,976,908.15/28,115.92
  6. Step 6: Final answer
    x = 21,446.10

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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.