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Finding the Fourth Proportional to 12,892.90, 18,101.90 and 12,892.90

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Solution

The fourth proportional to 12,892.90, 18,101.90 and 12,892.90 is: 18,101.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,892.90 : 18,101.90 = 12,892.90 : x
  2. Step 2: Convert to fraction form
    12,892.90/18,101.90 = 12,892.90/x
  3. Step 3: Cross multiply
    12,892.90x = 18,101.90 × 12,892.90
  4. Step 4: Simplify right side
    12,892.90x = 233,385,986.51
  5. Step 5: Solve for x
    x = 233,385,986.51/12,892.90
  6. Step 6: Final answer
    x = 18,101.90

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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.