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Finding the Fourth Proportional to 12,897.45, 18,017.55 and 12,897.45

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Solution

The fourth proportional to 12,897.45, 18,017.55 and 12,897.45 is: 18,017.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,897.45 : 18,017.55 = 12,897.45 : x
  2. Step 2: Convert to fraction form
    12,897.45/18,017.55 = 12,897.45/x
  3. Step 3: Cross multiply
    12,897.45x = 18,017.55 × 12,897.45
  4. Step 4: Simplify right side
    12,897.45x = 232,380,450.25
  5. Step 5: Solve for x
    x = 232,380,450.25/12,897.45
  6. Step 6: Final answer
    x = 18,017.55

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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.