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Finding the Fourth Proportional to 18,117.20, 25,390 and 18,117.20

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Solution

The fourth proportional to 18,117.20, 25,390 and 18,117.20 is: 25,390

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,117.20 : 25,390 = 18,117.20 : x
  2. Step 2: Convert to fraction form
    18,117.20/25,390 = 18,117.20/x
  3. Step 3: Cross multiply
    18,117.20x = 25,390 × 18,117.20
  4. Step 4: Simplify right side
    18,117.20x = 459,995,708
  5. Step 5: Solve for x
    x = 459,995,708/18,117.20
  6. Step 6: Final answer
    x = 25,390

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.