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Finding the Fourth Proportional to 18,578.79, 25,630.44 and 11,025.45

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Solution

The fourth proportional to 18,578.79, 25,630.44 and 11,025.45 is: 15,210.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,578.79 : 25,630.44 = 11,025.45 : x
  2. Step 2: Convert to fraction form
    18,578.79/25,630.44 = 11,025.45/x
  3. Step 3: Cross multiply
    18,578.79x = 25,630.44 × 11,025.45
  4. Step 4: Simplify right side
    18,578.79x = 282,587,134.70
  5. Step 5: Solve for x
    x = 282,587,134.70/18,578.79
  6. Step 6: Final answer
    x = 15,210.20

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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.