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Finding the Fourth Proportional to 13,990.62, 20,994.57 and 5,670.71

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Solution

The fourth proportional to 13,990.62, 20,994.57 and 5,670.71 is: 8,509.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.62 : 20,994.57 = 5,670.71 : x
  2. Step 2: Convert to fraction form
    13,990.62/20,994.57 = 5,670.71/x
  3. Step 3: Cross multiply
    13,990.62x = 20,994.57 × 5,670.71
  4. Step 4: Simplify right side
    13,990.62x = 119,054,013.07
  5. Step 5: Solve for x
    x = 119,054,013.07/13,990.62
  6. Step 6: Final answer
    x = 8,509.56

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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.