Home / 30,607.65-42,241.59-18,678.96

Finding the Fourth Proportional to 30,607.65, 42,241.59 and 18,678.96

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Solution

The fourth proportional to 30,607.65, 42,241.59 and 18,678.96 is: 25,778.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,607.65 : 42,241.59 = 18,678.96 : x
  2. Step 2: Convert to fraction form
    30,607.65/42,241.59 = 18,678.96/x
  3. Step 3: Cross multiply
    30,607.65x = 42,241.59 × 18,678.96
  4. Step 4: Simplify right side
    30,607.65x = 789,028,969.95
  5. Step 5: Solve for x
    x = 789,028,969.95/30,607.65
  6. Step 6: Final answer
    x = 25,778.82

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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.