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Finding the Fourth Proportional to 10,994.79, 15,172.06 and 7,015.46

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Solution

The fourth proportional to 10,994.79, 15,172.06 and 7,015.46 is: 9,680.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,994.79 : 15,172.06 = 7,015.46 : x
  2. Step 2: Convert to fraction form
    10,994.79/15,172.06 = 7,015.46/x
  3. Step 3: Cross multiply
    10,994.79x = 15,172.06 × 7,015.46
  4. Step 4: Simplify right side
    10,994.79x = 106,438,944.97
  5. Step 5: Solve for x
    x = 106,438,944.97/10,994.79
  6. Step 6: Final answer
    x = 9,680.85

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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.