Home / 30,960.70-42,732.57-20,351.32

Finding the Fourth Proportional to 30,960.70, 42,732.57 and 20,351.32

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Solution

The fourth proportional to 30,960.70, 42,732.57 and 20,351.32 is: 28,089.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,960.70 : 42,732.57 = 20,351.32 : x
  2. Step 2: Convert to fraction form
    30,960.70/42,732.57 = 20,351.32/x
  3. Step 3: Cross multiply
    30,960.70x = 42,732.57 × 20,351.32
  4. Step 4: Simplify right side
    30,960.70x = 869,664,206.49
  5. Step 5: Solve for x
    x = 869,664,206.49/30,960.70
  6. Step 6: Final answer
    x = 28,089.29

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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.