Home / 30,982.84-42,734.70-20,369.08

Finding the Fourth Proportional to 30,982.84, 42,734.70 and 20,369.08

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Solution

The fourth proportional to 30,982.84, 42,734.70 and 20,369.08 is: 28,095.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,982.84 : 42,734.70 = 20,369.08 : x
  2. Step 2: Convert to fraction form
    30,982.84/42,734.70 = 20,369.08/x
  3. Step 3: Cross multiply
    30,982.84x = 42,734.70 × 20,369.08
  4. Step 4: Simplify right side
    30,982.84x = 870,466,523.08
  5. Step 5: Solve for x
    x = 870,466,523.08/30,982.84
  6. Step 6: Final answer
    x = 28,095.12

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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.