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Finding the Fourth Proportional to 28,800.28, 39,718.03 and 19,738.81

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Solution

The fourth proportional to 28,800.28, 39,718.03 and 19,738.81 is: 27,221.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,800.28 : 39,718.03 = 19,738.81 : x
  2. Step 2: Convert to fraction form
    28,800.28/39,718.03 = 19,738.81/x
  3. Step 3: Cross multiply
    28,800.28x = 39,718.03 × 19,738.81
  4. Step 4: Simplify right side
    28,800.28x = 783,986,549.05
  5. Step 5: Solve for x
    x = 783,986,549.05/28,800.28
  6. Step 6: Final answer
    x = 27,221.49

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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.