Home / 30,490.54-42,077.57-18,390.96

Finding the Fourth Proportional to 30,490.54, 42,077.57 and 18,390.96

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Solution

The fourth proportional to 30,490.54, 42,077.57 and 18,390.96 is: 25,379.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,490.54 : 42,077.57 = 18,390.96 : x
  2. Step 2: Convert to fraction form
    30,490.54/42,077.57 = 18,390.96/x
  3. Step 3: Cross multiply
    30,490.54x = 42,077.57 × 18,390.96
  4. Step 4: Simplify right side
    30,490.54x = 773,846,814.81
  5. Step 5: Solve for x
    x = 773,846,814.81/30,490.54
  6. Step 6: Final answer
    x = 25,379.90

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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.