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Finding the Fourth Proportional to 18,240.20, 25,605.40 and 18,240.20

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Solution

The fourth proportional to 18,240.20, 25,605.40 and 18,240.20 is: 25,605.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,240.20 : 25,605.40 = 18,240.20 : x
  2. Step 2: Convert to fraction form
    18,240.20/25,605.40 = 18,240.20/x
  3. Step 3: Cross multiply
    18,240.20x = 25,605.40 × 18,240.20
  4. Step 4: Simplify right side
    18,240.20x = 467,047,617.08
  5. Step 5: Solve for x
    x = 467,047,617.08/18,240.20
  6. Step 6: Final answer
    x = 25,605.40

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Half scale
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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.