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Finding the Fourth Proportional to 65,863.80, 98,795.70 and 18,478.80

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Solution

The fourth proportional to 65,863.80, 98,795.70 and 18,478.80 is: 27,718.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,863.80 : 98,795.70 = 18,478.80 : x
  2. Step 2: Convert to fraction form
    65,863.80/98,795.70 = 18,478.80/x
  3. Step 3: Cross multiply
    65,863.80x = 98,795.70 × 18,478.80
  4. Step 4: Simplify right side
    65,863.80x = 1,825,625,981.16
  5. Step 5: Solve for x
    x = 1,825,625,981.16/65,863.80
  6. Step 6: Final answer
    x = 27,718.20

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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.