Home / 20,156.76-30,238.27-10,290.70

Finding the Fourth Proportional to 20,156.76, 30,238.27 and 10,290.70

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Solution

The fourth proportional to 20,156.76, 30,238.27 and 10,290.70 is: 15,437.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.76 : 30,238.27 = 10,290.70 : x
  2. Step 2: Convert to fraction form
    20,156.76/30,238.27 = 10,290.70/x
  3. Step 3: Cross multiply
    20,156.76x = 30,238.27 × 10,290.70
  4. Step 4: Simplify right side
    20,156.76x = 311,172,965.09
  5. Step 5: Solve for x
    x = 311,172,965.09/20,156.76
  6. Step 6: Final answer
    x = 15,437.65

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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.