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Finding the Fourth Proportional to 8,994.40, 12,410.78 and 5,015.40

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Solution

The fourth proportional to 8,994.40, 12,410.78 and 5,015.40 is: 6,920.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,994.40 : 12,410.78 = 5,015.40 : x
  2. Step 2: Convert to fraction form
    8,994.40/12,410.78 = 5,015.40/x
  3. Step 3: Cross multiply
    8,994.40x = 12,410.78 × 5,015.40
  4. Step 4: Simplify right side
    8,994.40x = 62,245,026.01
  5. Step 5: Solve for x
    x = 62,245,026.01/8,994.40
  6. Step 6: Final answer
    x = 6,920.42

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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.