Home / 30,990.09-42,765.12-16,842.63

Finding the Fourth Proportional to 30,990.09, 42,765.12 and 16,842.63

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Solution

The fourth proportional to 30,990.09, 42,765.12 and 16,842.63 is: 23,242.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,990.09 : 42,765.12 = 16,842.63 : x
  2. Step 2: Convert to fraction form
    30,990.09/42,765.12 = 16,842.63/x
  3. Step 3: Cross multiply
    30,990.09x = 42,765.12 × 16,842.63
  4. Step 4: Simplify right side
    30,990.09x = 720,277,093.07
  5. Step 5: Solve for x
    x = 720,277,093.07/30,990.09
  6. Step 6: Final answer
    x = 23,242.17

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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.