Home / 20,342.87-30,519.81-18,390.98

Finding the Fourth Proportional to 20,342.87, 30,519.81 and 18,390.98

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Solution

The fourth proportional to 20,342.87, 30,519.81 and 18,390.98 is: 27,591.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.87 : 30,519.81 = 18,390.98 : x
  2. Step 2: Convert to fraction form
    20,342.87/30,519.81 = 18,390.98/x
  3. Step 3: Cross multiply
    20,342.87x = 30,519.81 × 18,390.98
  4. Step 4: Simplify right side
    20,342.87x = 561,289,062.71
  5. Step 5: Solve for x
    x = 561,289,062.71/20,342.87
  6. Step 6: Final answer
    x = 27,591.45

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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.