Home / 30,989.86-42,765.77-16,842.80

Finding the Fourth Proportional to 30,989.86, 42,765.77 and 16,842.80

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Solution

The fourth proportional to 30,989.86, 42,765.77 and 16,842.80 is: 23,242.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,989.86 : 42,765.77 = 16,842.80 : x
  2. Step 2: Convert to fraction form
    30,989.86/42,765.77 = 16,842.80/x
  3. Step 3: Cross multiply
    30,989.86x = 42,765.77 × 16,842.80
  4. Step 4: Simplify right side
    30,989.86x = 720,295,226.74
  5. Step 5: Solve for x
    x = 720,295,226.74/30,989.86
  6. Step 6: Final answer
    x = 23,242.94

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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.