Home / 30,811.09-42,519.90-17,379.70

Finding the Fourth Proportional to 30,811.09, 42,519.90 and 17,379.70

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Solution

The fourth proportional to 30,811.09, 42,519.90 and 17,379.70 is: 23,984.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,811.09 : 42,519.90 = 17,379.70 : x
  2. Step 2: Convert to fraction form
    30,811.09/42,519.90 = 17,379.70/x
  3. Step 3: Cross multiply
    30,811.09x = 42,519.90 × 17,379.70
  4. Step 4: Simplify right side
    30,811.09x = 738,983,106.03
  5. Step 5: Solve for x
    x = 738,983,106.03/30,811.09
  6. Step 6: Final answer
    x = 23,984.32

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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.