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Finding the Fourth Proportional to 12,015.13, 18,009.93 and 7,087.09

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Solution

The fourth proportional to 12,015.13, 18,009.93 and 7,087.09 is: 10,623.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,015.13 : 18,009.93 = 7,087.09 : x
  2. Step 2: Convert to fraction form
    12,015.13/18,009.93 = 7,087.09/x
  3. Step 3: Cross multiply
    12,015.13x = 18,009.93 × 7,087.09
  4. Step 4: Simplify right side
    12,015.13x = 127,637,994.80
  5. Step 5: Solve for x
    x = 127,637,994.80/12,015.13
  6. Step 6: Final answer
    x = 10,623.11

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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.