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Finding the Fourth Proportional to 25,632.80, 38,447.80 and 18,105.40

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Solution

The fourth proportional to 25,632.80, 38,447.80 and 18,105.40 is: 27,157.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,632.80 : 38,447.80 = 18,105.40 : x
  2. Step 2: Convert to fraction form
    25,632.80/38,447.80 = 18,105.40/x
  3. Step 3: Cross multiply
    25,632.80x = 38,447.80 × 18,105.40
  4. Step 4: Simplify right side
    25,632.80x = 696,112,798.12
  5. Step 5: Solve for x
    x = 696,112,798.12/25,632.80
  6. Step 6: Final answer
    x = 27,157.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.