Home / 30,968.40-42,736.32-16,821.12

Finding the Fourth Proportional to 30,968.40, 42,736.32 and 16,821.12

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Solution

The fourth proportional to 30,968.40, 42,736.32 and 16,821.12 is: 23,213.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.40 : 42,736.32 = 16,821.12 : x
  2. Step 2: Convert to fraction form
    30,968.40/42,736.32 = 16,821.12/x
  3. Step 3: Cross multiply
    30,968.40x = 42,736.32 × 16,821.12
  4. Step 4: Simplify right side
    30,968.40x = 718,872,767.08
  5. Step 5: Solve for x
    x = 718,872,767.08/30,968.40
  6. Step 6: Final answer
    x = 23,213.11

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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.