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Finding the Fourth Proportional to 18,215.20, 25,559.60 and 18,215.20

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Solution

The fourth proportional to 18,215.20, 25,559.60 and 18,215.20 is: 25,559.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,215.20 : 25,559.60 = 18,215.20 : x
  2. Step 2: Convert to fraction form
    18,215.20/25,559.60 = 18,215.20/x
  3. Step 3: Cross multiply
    18,215.20x = 25,559.60 × 18,215.20
  4. Step 4: Simplify right side
    18,215.20x = 465,573,225.92
  5. Step 5: Solve for x
    x = 465,573,225.92/18,215.20
  6. Step 6: Final answer
    x = 25,559.60

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Half scale
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Double 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.