Home / 28,243.84-38,976-15,668.16

Finding the Fourth Proportional to 28,243.84, 38,976 and 15,668.16

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Solution

The fourth proportional to 28,243.84, 38,976 and 15,668.16 is: 21,621.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,243.84 : 38,976 = 15,668.16 : x
  2. Step 2: Convert to fraction form
    28,243.84/38,976 = 15,668.16/x
  3. Step 3: Cross multiply
    28,243.84x = 38,976 × 15,668.16
  4. Step 4: Simplify right side
    28,243.84x = 610,682,204.16
  5. Step 5: Solve for x
    x = 610,682,204.16/28,243.84
  6. Step 6: Final answer
    x = 21,621.78

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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.