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Finding the Fourth Proportional to 12,835.55, 17,712.98 and 7,170.25

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Solution

The fourth proportional to 12,835.55, 17,712.98 and 7,170.25 is: 9,894.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,835.55 : 17,712.98 = 7,170.25 : x
  2. Step 2: Convert to fraction form
    12,835.55/17,712.98 = 7,170.25/x
  3. Step 3: Cross multiply
    12,835.55x = 17,712.98 × 7,170.25
  4. Step 4: Simplify right side
    12,835.55x = 127,006,477.97
  5. Step 5: Solve for x
    x = 127,006,477.97/12,835.55
  6. Step 6: Final answer
    x = 9,894.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.