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Finding the Fourth Proportional to 9,175.80, 12,863.40 and 9,175.80

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Solution

The fourth proportional to 9,175.80, 12,863.40 and 9,175.80 is: 12,863.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,175.80 : 12,863.40 = 9,175.80 : x
  2. Step 2: Convert to fraction form
    9,175.80/12,863.40 = 9,175.80/x
  3. Step 3: Cross multiply
    9,175.80x = 12,863.40 × 9,175.80
  4. Step 4: Simplify right side
    9,175.80x = 118,031,985.72
  5. Step 5: Solve for x
    x = 118,031,985.72/9,175.80
  6. Step 6: Final answer
    x = 12,863.40

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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.