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Finding the Fourth Proportional to 65,618.84, 98,443.88 and 21,245.60

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Solution

The fourth proportional to 65,618.84, 98,443.88 and 21,245.60 is: 31,873.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,618.84 : 98,443.88 = 21,245.60 : x
  2. Step 2: Convert to fraction form
    65,618.84/98,443.88 = 21,245.60/x
  3. Step 3: Cross multiply
    65,618.84x = 98,443.88 × 21,245.60
  4. Step 4: Simplify right side
    65,618.84x = 2,091,499,296.93
  5. Step 5: Solve for x
    x = 2,091,499,296.93/65,618.84
  6. Step 6: Final answer
    x = 31,873.46

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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.