Home / 30,740.70-42,428.80-18,167.34

Finding the Fourth Proportional to 30,740.70, 42,428.80 and 18,167.34

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Solution

The fourth proportional to 30,740.70, 42,428.80 and 18,167.34 is: 25,074.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,740.70 : 42,428.80 = 18,167.34 : x
  2. Step 2: Convert to fraction form
    30,740.70/42,428.80 = 18,167.34/x
  3. Step 3: Cross multiply
    30,740.70x = 42,428.80 × 18,167.34
  4. Step 4: Simplify right side
    30,740.70x = 770,818,435.39
  5. Step 5: Solve for x
    x = 770,818,435.39/30,740.70
  6. Step 6: Final answer
    x = 25,074.85

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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.