Home / 30,520.86-42,119.43-18,584.70

Finding the Fourth Proportional to 30,520.86, 42,119.43 and 18,584.70

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Solution

The fourth proportional to 30,520.86, 42,119.43 and 18,584.70 is: 25,647.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,520.86 : 42,119.43 = 18,584.70 : x
  2. Step 2: Convert to fraction form
    30,520.86/42,119.43 = 18,584.70/x
  3. Step 3: Cross multiply
    30,520.86x = 42,119.43 × 18,584.70
  4. Step 4: Simplify right side
    30,520.86x = 782,776,970.72
  5. Step 5: Solve for x
    x = 782,776,970.72/30,520.86
  6. Step 6: Final answer
    x = 25,647.28

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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.